Revision of Eucorydia Hebard, 1929 from China, with notes on the genus and species worldwide (Blattodea, Corydioidea, Corydiidae)

Abstract The cockroach genus Eucorydia from China is revised. Five new species are described and illustrated: Eucorydia linglong sp. n., Eucorydia pilosa sp. n., Eucorydia splendida sp. n., Eucorydia guilinensis sp. n., and Eucorydia tangi sp. n.. Corydia purpuralis Kirby, 1903 and Eucorydia paucipilosa Woo, Guo & Feng, 1986 are confirmed to be junior synonyms of Eucorydia dasytoides (Walker, 1868). Eucorydia hilaris (Kirby, 1903) is newly recorded from China. This genus and currently known species from around the world are discussed. The status of Eucorydia maxwelli (Hanitsch, 1915) is revived. Corydia plagiata Walker, 1868 is confirmed to be a junior synonym of Eucorydia ornata (Saussure, 1864). A checklist, key, and photographs of members of this genus are provided.

Redescription. Male: measurements (mm): body length 11.0-18.5, overall length 18.6-22.3, pronotum length×width: 5.0-5.6×7.3-9.4, tegmen length: 15.1-18.3. Large, metallic bluish green. Head shining black, slightly metallic blue. Pronotum metallic bluish green to blue, with black setae. Tegmina with basal half metallic bluish green, distal half with a yellow band transversely across the tegmina, sometimes the band interrupted twice and divided into three parts (usually the population from Zhejiang and Fujian, Fig. 5A, D, F, H, J), and sometimes the band interrupted medially and divided into two parts (the population from Taidong, Taiwan, Fig. 4E); the area near the basal edge of the yellow band usually metallic purple, the apical portion of tegmina blackish, slightly metallic purple. Wings hyaline, apex brown, anterior margin of the RA area with an elongate yellow spot, venation brown, median area of M and CuA yellow, some individuals with wings totally dark brown. Legs dark brown to black, slightly pubescent, spines on the legs black, with apex reddish brown.
Abdomen in ventral view, the last sternites black, the rest part orange (usually the populations from Tonkin, Vietnam, and Yunnan, Guangxi, Hainan and Taiwan), sometimes with median blackish widely (usually the populations from Guizhou, Hunan); in dorsal view the last terga black, the rest terga orange, or dark purple in the middle and orange laterally (the populations from Guizhou and Hunan). Supra-anal plate with hind margin slightly obtuse angle concaved, two hind corners slightly round, cerci black, long ( Fig. 6A-B). Subgenital plate black, styli robust, black.
Female: body length 12.0-17.5 mm. The coloration and marking pattern are similar to that of male. Abdomen in ventral view with the last two sternites black, the rest of sternites orange, or with median blackish widely (usually the populations from Zhejiang and Fujian).
Remarks. This species is widely distributed from South China to North Vietnam and with distinct geographical variation, which can be divided into six populations. The type population, which is the most widespread, is characterized by the narrow orange band in tegmina and blackish abdomen ( Fig. 2; sternites all black and terga all dark purple, but with median three segments orange laterally). This character agrees with that of the type specimen of Euthyrrhapha dasytoides Walker. So far this population is known to cover the following localities: South Fujian, East Guizhou and Hunan. Guangdong and Jiangxi, the provinces in between Fujian and Hunan, should also be within this population range, but we did not examine any specimens. The tonkinensis population is characterized by the moderate width of orange band, large body size and orange abdomen ( Fig. 3; in male, both the sternites and terga with the last 4-5 segments black, the rest of segments totally orange; in female, the last two sternites black and the last five terga black, the remaining segments totally orange). This character is in agreement with that of the type specimen of Corydia tonkinensis Kirby. This population is found in Guangxi, Yunnan and North Vietnam. We have examined the type specimen of Eucorydia paucipilosa and found it to not be different from the tonkinensis population of E. dasytoides; thus we treat it as a junior synonym of E. dasytoides. The purpuralis population is distributed in Zhejiang and Central and North Fujian, which is characterized by the orange band of tegmina twice interrupted and orange abdomen in male but black abdomen in female (Fig. 5; male with the last four segments black, the rest all orange, female with sternites black and terga dark purple, but orange laterally). This population was formerly accepted as an independent species Eucorydia purpuralis Hebard, but we found no distinct differences in the male genitalia between E. purpuralis and E. dasytoides. Thus we here synonymize E. purpuralis under E. dasytoides. The Hainan population is characterized by the wide orange band in tegmina and orange abdo-men ( Fig. 4G-J; the scope of the orange area in abdomen larger: sternites and terga with the last three black, the lateral margins of last 4-5 terga black, the rest of segments totally orange). This population is newly discovered from Hainan Island. The zonata population is distributed in Taoyuan, Xinzhu (Fuhosho = 内茅埔, Hoozan = 宝山), Gaoxiong (Kosempo = 甲仙, Nanshanchi = 南山溪), Taizhong (Momoyama = 桃山) and Nantou (Horisha/Hori/Polisha = 埔里, Musha = 雾社, Keitao = 溪 头, Kwantochi = 关刀溪), Xinbei (Wulai= 乌来), Jiayi (Taihorin = 大蒲林), all in Taiwan (this distribution is based on Asahina, 1971). It was originally treated as an independent species Eucorydia zonata Shiraki, but later synonymized under E. dasytoides (Princis, 1963). It is similar to the Hainan population; the scope of the orange in the abdomen is larger, but with a narrower orange band in tegmina ( Fig. 4A-D). The taitoensis population is found in Taidong (= Taito) in south Taiwan. It can be easily recognized by the once interrupted orange band in tegmina ( Fig. 4E-F).
The six populations are all well characterized by the features mentioned above. Their male genitalia show only minor differences (see Fig. 6) and we consider them to be the same species. Their distribution is continuous; thus it is not proper to divide them into subspecies. We also found aberrant individuals between some populations, e.g., a male from Yueyang, Hunan is found with the tegmina band twice interrupted, but its abdomen is black (Fig. 2K); two males from the top of Tianmushan, Zhejiang had a black abdomen, but the band was twice interrupted ( Fig. 5F-G). These examples also indicate that E. purpuralis is conspecific with E. dasytoides.
Natural history. At Mingfenggu, Mt. Jianfengling, Hainan in 2015, most individuals were picked up from the ground in the hotel yard by the first author. The individuals on the ground were usually weak or had just died. These species may have inhabited the trees around the hotel and may have fallen down during death, or under the force of wind. A dead cockroach body was found inside the humus in a huge tree bole in the Mingfenggu Forest. A living individual was also observed by the first author on the roof; when approached, it quickly flew away towards the forest. In Taiwan Diagnosis. This species resembles E. aenea, E. forceps, E. coerulea, and E. gemma by having two spots on the lateral margins of tegmina, but it can be distinguished from E. aenea and E. forceps by the arrangement of the white pubescence (band shaped in E. linglong, while circle-shaped in E. aenea and E. forceps); it differs from E. coerulea by the white pubescence (with white pubescence in E. linglong while without in E. coerulea); it can be distinguished from E. gemma by the larger body size (more than 10 mm without tegmina in E. linglong, while less than 10 mm in E. gemma).
Abdomen in ventral view, the last four sternites (including subgenital plate) dark brown, slightly metallic, the rest with lateral portions orange, median blackish; in dorsal view, the last five terga (including supra-anal plate) black, the rest of terga purplish black but with the three orange lateral portions. Supra-anal plate with hind median roundly concave, lateral hind corners round, cerci short (Fig. 8A); subgenital plate with two long styli. Genitalia (Fig. 8A): L3 curved, the apex hook with curved part protruded, left base of appendage sclerite with an elongate and sharp process, hind apex with a sharp elongation, R2 elongate, each apex round.
Female: overall length 12.7 mm, similar to male, but with short tegmina which extends only slightly beyond the end of abdomen (Fig. 7N-O).
Etymology. The specific epithet "linglong [玲珑]" means small and elegant in Chinese, in reference to its small and gorgeous body.
Natural history. A male was found on the ground by accident during a rainy day in Manhao, Yunnan (Fig. 14A, Jin Chen, pers. comm.). The female paratype was collected by Mr. Yi-Zhou Liu from a pile of wood (Fig. 14C Diagnosis. This species resembles the tonkinensis population of E. dasytoides, but differs from the latter by: 1) having whitish pubescence at the base of tegmina, 2) the cerci of male is shorter; 3) median of supra-anal plate widely "V" shaped ( Fig. 8C, No.1-2) (the concave part narrow, more round laterally in the supra-anal plate of tonkinensis population of E. dasytoides); 4) R2 elongate and rhomboid (Fig. 8C, No. 6) (nearly round in the tonkinensis population of E. dasytoides (Fig. 6F, G-O, No. 2).
Head shiny, metallic blackish blue; antennae (except the whitish segments), maxillary palpi and labial palpi black. Pronotum metallic blue, with black long setae. Tegmina with basal half metallic blue, the basal half of anal areas with white pubescence, distal half with a yellow band transversely across the tegmina which occupies nearly 1/6 of the tegmen length, the basal edge of the band metallic purple, the apical portion of tegmina blackish, slightly metallic purple. Wing brown, venation brown, distinct, median of the outer margin with elongate yellow spots, a yellow trail originates from each spot and extends to the median of the wing. Legs black, slightly pubescent, spines on the legs black, with apex reddish brown.
Abdomen in ventral view, margins pubescent, the last two and the lateral portions of 6 th to 7 th sternites black, slightly metallic, the rest orange. Supra-anal plate with hind median broadly concave, cerci short (Fig. 8C, No. 1-2); subgenital plate with two long and robust styli. Genitalia (Fig. 8C): L3 with the apex hook gently curved; the appendage sclerite with basal left roundly protruding, hind portion elongate, gradually narrower; R2 elongate, slightly rhomboid shaped, details as in Fig. 8C, No. 6.
Female unknown. Etymology. The species epithet "pilosa" refers to its whitish pubescence on tegmina base.
Remarks. This species and E. dasytoides were confused and misidentified in Woo et al. (1986). They treated this species as E. dasytoides, and an E. dasytoides individual from Yunnan as a new species E. paucipilosa Woo, Guo & Feng. Natural history. The holotype was found inside a mixture of humus by the second author.
Eucorydia hilaris (Kirby, 1903) Tegmina in resting position with basal half metallic blue, the distal half totally yellow; the border between the two colors nearly straight in the middle, median area of the metallic part more protruded than the lateral areas. Wings yellow. Legs brown. Abdomen orange both in dorsal and ventral view; in ventral view, S7, S8 and lateral portions of S6 brown; in dorsal view, lateral margins of T6-T8 brownish black narrowly, T9 brownish black. Supra-anal plate brownish black, hind margin concave, obtuse angle-shaped; subgenital plate brownish black (Fig. 9D-E).
This species resembles E. splendida sp. n. and E. xizangensis, but differs from both by the border shape between the orange part and metallic part on tegmina. Also, its supra-anal plate with hind margin concave at an obtuse angle, while supra-anal plate with hind margin roundly concave in E. splendida and straight in E. xizangensis.
Remarks. This species is described based on three specimens without collection data. Two photographs of this species were obtained from Yunnan, China (Fig. 14L-M), but no specimens are available for study. The photo information are listed as followed: Fig. 14L,  Natural history. The female (Fig. 14M) was found behind a tree; it was lying on the dead part of the tree when captured (Fig. 14N,  Diagnosis. This species resembles E. splendida sp. n. and E. hilaris, but can be easily distinguished by its tegmina marking pattern, the basal metallic portions of E. xizangensis are much reduced, while the latter two have the basal portion of tegmina widely metallic bluish green. E. xizangensis can also be easily distinguished from E. splendida by: 1) hind margin of supra-anal plate straight (Fig. 10A, No. 1-2), while concave in E. splendida (Fig. 10B, No. 1-2); 2) L3 with apex less hooked (Fig. 10A, No. 3), while L3 strong hooked in E. splendida (Fig. 10B, No. 3); 2) R2 with an elongate irregular process on the left, apex of the process curved (Fig. 10A, No. 6), while R2 normally protruded toward left in E. splendida (Fig. 10B, No. 6).
Head metallic bluish black, ocelli distinct. Pronotum deep metallic blue, margins with black setae. Mesonotum and metanotum purplish brown. Tegmina orange, Sc field of each tegmen metallic bluish purple, which areas extend and direct inward, forming a large round spot around CuP in cfr; wings yellow entire. Legs shiny black, with black pubescence, spines on the legs black.
Abdomen in ventral view orange, the last four sternites metallic black, styli black, S6 slightly yellowish medially and with two small yellow spots laterally; in dorsal view orange, T5 and T6 with lateral margins narrowly blackish brown, T7 and T8 with median orange, lateral parts black. Supra-anal plate black, hind margin nearly straight, cerci black, long (Fig. 10A, No.1-2); subgenital plate with robust styli.   (Fig. 9G-H).
Head metallic bluish black, ocelli small but distinct. Pronotum metallic bluish green, with black setae. Mesonotum and metanotum purplish brown. Tegmina in resting position with basal half metallic bluish green, distal half orange entire, the border between the two colors W-shaped, the distal border of the metallic area much more blue than the rest of area; wings totally yellow. Legs brownish black, with black pubescence, spines on the legs brownish black, with apical portion brown.
Abdomen in ventral view bright orange, the last three sternites dark shiny brown, S6 with lateral parts brown, median orange; in dorsal view, bright orange, T6 and T7 with lateral margins narrowly blackish brown, T8 and T9 with median orange, lateral parts black. Supra-anal plate black, hind margin roundly concave, lateral corners round, cerci black (Fig. 10B, No. 1-2); subgenital plate black, styli robust, dark brown. Genitalia (Fig. 10B): L3 slender, strongly curved, apical portion with a distinct hook, the apex of the curved point of the hook protruding; appendage sclerite with left portion roundly enlarged at the base, distal portion gradually narrowed, apex angular; R2 with left slightly protruded, shape as in Fig. 10B, No. 6, R3 with anterior portion reflexed.
Female: Coloration pattern similar to male, tegmina distinctly shorter than that of male ( Fig. 9I-J).
Head black, slightly metallic blue, ocelli small but distinct. Pronotum metallic bluish green to green, with black setae. Tegmina in resting position metallic bluish green to green, distal portion with a wide yellow band, apical portion bluish brown, slightly metallic; wings brown, median yellowish. Legs brownish black, with black pubescent, spines on the legs brownish black, with apical portion reddish brown.
Head black, slightly dark metallic green, vertex with black pubescence and mingled with some yellowish white pubescence. Pronotum metallic green, with distinct short yellowish white pubescence, and mingled with some long black setae. Tegmina metallic green, in resting position, the distal half with a transverse orange band, occupying approximately 1/5 of the tegmen length, apical portion of the tegmen purplish brown, slightly metallic; surface of the basal portion of the tegmina and the orange band with short yellowish white pubescence. Wing transparent, slightly brownish, RA area with a slender yellow spot, RP area brown, venation brown. Legs dark brown, with brown pubescence, spines on the legs yellowish brown.
Abdomen in ventral view, the last four sternites dark brown, the rest of sternites orange, with median slightly brownish; in dorsal view, T8 and T9 and lateral parts of T6 and T7 dark brown, slightly metallic, the rest of terga orange. Supra-anal plate dark brown, hind margin widely concave, cerci dark brown (Fig. 8D, No. 1-2); subgenital plate dark brown, with robust styli. Genitalia (Fig. 8D): L3 slender, strongly curved, apex with a distinct hook (Fig.  8D (3)); the appendage sclerite with anterior strongly protruded and curved toward left-posterior, distal portion with a small bud-like process (Fig. 8D); R2 small and round, left with a short protruding and a white area, shape as in Fig. 8D Diagnosis. This species resembles Eucorydia guilinensis sp. n., but can be distinguished from the latter by the following characters: 1) body larger (15.9-16.3 mm) and broader (8.6-8.8 mm), while body small (13.8-14.2 mm) and narrow (7.0-7.2 mm) in E. guilinensis; 2) the white pubescence on tegmina is mainly limited to the suture of left tegmen and 1/3 of basal anal area on both tegmina, while the pubescence more widely distributed at the base of tegmina in E. guilinensis; 3) the concave part of supra-anal plate more straight (Fig. 10C, No. 1-2), while more round in E. guilinensis (Fig. 8D, No. 1-2); 4) the appendage sclerite with basal left protruded, distal margin of the protruded part straight (Fig. 10C, No. 5), while the appendage sclerite with basal left protruded and strongely curved toward posterior (Fig. 8D, No. 5).
Head metallic greenish black, vertex with black pubescence. Pronotum metallic greenish blue entire, with short white pubescence, margins with black setae. Tegmen short and broad, metallic greenish blue, in resting position, the distal half of tegmina with a transverse orange band, occupying nearly 1/7 of the tegmen length, apical portion of the tegmen metallic bluish brown; surface of the basal edges of the tegmina, the sutural margin of left tegmen, and the orange band covered with short white pubescence. Wing transparent, slightly brownish. Legs dark brown, with blackish pubescence, spines on the legs brown.

Type material examined. LECTOTYPE of
Diagnosis. Total length (including tegmina) nearly 15.0 mm for male, 12.0 mm for female. Body metallic blue, head metallic blue, legs dark brown, tegmina metallic blue, anterior lateral margin of the tegmen with an elongate yellow spot, tegmen surface with circle white pubescence. Abdomen in ventral view brownish black, three segments orange laterally, in dorsal view dark with metallic blue, three segments orange laterally.
Remarks. This species is characterized by tegmina with two elongate yellow spots, whitish pubescence, and the abdomen with lateral portions orange emarginated. The original description didn't mention how many specimens were designated as types. We found three specimens from NHMV which were all labeled "Ostindien, fr. Fieber, Coll. Br. v. W.". None had a type label, except one with a red label which was handwritten with an illegible letter. We consider this specimen as the one which Brunner von Wattenwyl studied (Brunner von Wattenwyl 1865); it is the only one to possess an opened tegmen and wing, and the original description paid much attention to the tegmen and wing. Also, because of the red label, we designated it as the lectotype.
Walker (1868) reported Eucorydia dasytoides var. β from Siam as "abdomen beneath with a large luteous patch on each side. Fore wings without a band, but with an elongated spot on the costa". This description and locality agree with E. aenea, so we consider this E. dasytoides var. β as E. aenea.

Diagnosis.
Male: Total length about 15 mm, body metallic blue, legs and abdomen metallic blue. Tegmina with two small yellow spots laterally. Tegmina covered with white pubescence, the arrangement as in Fig. 11K. Lateral portions of abdomen orangish emarginated.
This species resembles E. aenea, but with legs and abdomen metallic blue, and the yellow spots on tegmina are small.
Distribution. So far this species is recorded from the type locality Fort de Kock, Sumatra, and Java.

Diagnosis.
Male overall length 13.5 mm, tegmen length 10 mm (Shelford, 1906). Body in dorsal view brilliant metallic blue. Head slightly metallic blue. Tegmina metallic blue, with some obscure orange spots on the disc (Shelford, 1906), each lateral margin of tegmina with an elongate, narrow yellow spot. Wings blackish, hyaline. Mesonotum and metanotum purplish brown. Legs slightly metallic blue. Abdomen orange both in dorsal and ventral view, in dorsal view, the last three segments metallic blue, subgenital plate bright metallic blue.
This species is similar to E. aenea, but its tegmina has no white pubescence, the last three segments of abdomen are much more metallic than those of E. aenea, and the remaining segments of abdomen are totally orange while E. aenea has the median of the abdomen blackish.

Eucorydia multimaculata
This species can be easily recognized by its multiple peculiar color patches on tegmina. Distribution. Indonesia: Sumatra.  Diagnosis. Female: overall length: 9.5 mm, body length 9.0 mm, pronotum length×width 3.0×4.2 mm, tegmina length 6.5 mm. Body brownish black with yellowish pubescence, margins of body sparsely covered with long and rough blackish setae. Pronotum dull black, with apex and lateral margins narrowly dull reddish. Tegmina dull black entire, covered with small yellow pubescence. In dorsal view, mesonotum and metanotum metallic blue, lateral borders of abdomen with 3-5 segments orange both in dorsal and ventral view. This species is distinguished by its dull blackish coloration, which makes it unique in Eucorydia.

Material examined. None.
Diagnosis. Combining the original description (Gerstaecker 1861) and the French description (translated from the original description) (Brunner von Wattenwyl 1865), this species is characterized as follows: female length 13.0 mm; antennae black; pronotum dull blue, margins with long black hair; tegmina orange, each tegmen with a blackish blue strip originates from the anterior margin, extends from the base to the middle and curved inwardly, ends bulbously, an oval spot of the same color is situated at the sutural margin of the tegmina and ends in front of the middle, one third of the apical portion of the tegmina brownish black.
This species resembles E. ornata by its tegmina marking pattern, but differs from the latter by the pronotum, the former with pronotum unicolored, while the latter has two yellow elongate spots on the pronotum laterally.
Remarks. This species was reported from Assam by one single female (Gerstaecker, 1861). Hebard (1929) established the genus Eucorydia and designated this species as the type species. Asahina (1971) recorded two males of E. plagiata from Nepal (one from "East Nepal", the other from "Dharan, at Grkha camp"); from the description, we consider them as E. westwoodi because their pronotum lacks yellow spots. In addition to the examples Asahina examined, he also mentioned one specimen without yellow spots from Darjeeling.
Diagnosis. Male overall length nearly 15.0 mm (including tegmina), female overall length about 11.5 mm. Pronotum black, slightly dark bluish, each lateral border with one elongate yellow spot. Tegmina yellow, with pattern similar to that of E. westwoodi; lateral margin of tegmen with an elongate blackish brown stripe that originates from the base and extends to the middle of tegmen margin; the apical portion curves inward and apex becomes bulbous, the distal portion of anal area with an large blackish oval spot, apex of tegmina brownish. Some individual with the yellow areas of tegmina reduced, and occupied by large blackish brown markings. Legs brown to dark brown, slightly bluish, abdomen yellow, with apical portion brown.
Remarks. This species was originally recorded from Bombay, India (Saussure 1864). Brunner von Wattenwyl (1893) described E. elegans from Carin Chebà, Myanmar, but this was later synonymized under E. ornata by Kirby (1904). We did not examine the type specimens of E. elegans, but the original description and illustration of E. elegans are in agreement with the type specimen of E. plagiata; thus we consider Kirby's synonymy (1904) reasonable. After examining the type of E. ornata and E. plagiata, we found the two types to have the same marking pattern, and the pronotum all with two elongate spots on the borders; thus we treat E. plagiata as a junior synonym of E. ornata.
From the original description of E. westwoodi, we found E. ornata quite similar to E. westwoodi by its tegmina marking. Yet they exhibit a distinct difference on the pronotum. The former has its pronotum with yellow elongate spots laterally, while the latter has a unicolored pronotum. E. ornata may be one variation of E. westwoodi, or a subspecies. We temporarily maintain them as two species since current knowledge is too limited to solve the problem.
Distribution. India: Bombay; Myanmar. Eucorydia maxwelli (Hanitsch, 1915), stat. rev. Fig. 13H Diagnosis. This species may show sexual dimorphism. Male overall length about 11.0 mm (including tegmina); head orange, pronotum black; tegmina orange, each tegmen with a round black spot in the center, and with apex blackish; coxae, femora and abdomen orange, tibiae, tarsi and cerci black. Female overall length about 11.0 mm; head, pronotum, legs and cerci black, tegmina orange; lateral of tegmen with a stripe occupying the entire half of basal margin, and curved inward near the median, the curved part slightly enlarged and quadrate, the entire anal areas are encircled by the two stripes, apex of tegmina blackish; abdomen black, lateral margins orange.
Remarks. Hanitsch (1915) described Corydia maxwelli from southeast Asia. He realized this species showed sexual dimorphism, and later synonymized it under E. westwoodi (Hanitsch, 1932) based on the female tegmina pattern. However, this was in error: E. westwoodi indeed is similar to E. maxwelli by the lateral blackish strips and the blackish apex on tegmina; but the former had an additional large oval spot near the anal area, while the later lacks a spot near the anal area. In addition, E. westwoodi is distributed in North India and Nepal, while E. maxwelli is in southeast Asia. Since the two species are geographically disjunct we believe they are unlikely to be the same species, and we suggest restoring the status of E. maxwelli.
The sexual dimorphism of this species is unusual in Eucorydia. Other Eucorydia species show weak sexual dimorphism; the female generally resembles the male, but with shorter tegmina and wings. Hanitsch (1915) at first has stated that the female he described may be another species. Later, he correctly treated it as sexual dimorphism and synonymized C. maxwelli under E. westwoodi (Hanitsch, 1932), but without convincing reasons. According to the collection data in Hanitsch (1915), the males and females are not from the same place, which could lead to false pairing. We consider the female more likely to be a separate species.
Remarks. To date, this is the only Eucorydia species recorded in Japan. However, Sakamaki and Tsuda (2006) also recorded one unknown species from Uji Island. That species superficially resembles the purpuralis population of E. dasytoides but whether it is a new species is still undetermined.

Material examined. None.
Remarks. This species was reported in Asahina (1971), where it was misidentified as E. aenea. According to Asahina, it is characterized as following: male body length 14.5 mm, tegmen length 13.0 mm; female body length 14.0 mm, tegmen length 9.0 mm. Female similar to the male, head shiny black, pronotum metallic blue. Tegmina metallic blue, basal half of the anal areas yellow, median of the tegmina with three large yellow spots, the lateral two on the margins, slightly elongate, the median one transverse. Abdomen orange in dorsal view, terga 1, 7 and 8 black laterally, terga 9, supra-anal plate and cerci black, subgenital plate and styli black.
After examining the specimens of E. aenea that Brunner v. W. studied, this species shows a very different tegmina color pattern from E. aenea. Eucorydia sp. 1 has more yellow spots on its tegmina (two yellow spots at base and three large yellow spots distributed in the middle), while E. aenea only has two elongate yellow spots on the tegmina margins. The marking pattern of the tegmina also distinctly differentiates it from other congeners. Thus it is considered an unnamed species, but due to lack of specimens for study, it is simply recorded here for future study.
Distribution. Thailand: Chiang Mai (Doi Pui). Remarks. This species resembles E. sp. 1 with the basal half of anal areas yellow on tegmina, but differs from the latter by the orange band on distal half of tegmina, while the latter with three large yellow spots on distal half of tegmina. The last two sternites of this species are metallic bluish black, the remaining sternites are brownish black in the middle and orange laterally. The tegmina pattern of this species can be easily distinguished from the other species of this genus, which indicates it could be a new species. However, because no male specimen is available to us, we record it here for future study.