Male. (Figs 1–2, 4) Antennae: 12.5 mm in length, dorsal side shaft dark brown and club black, ventral side basal half dark brown and distal half covered with milky white scales, apiculus slender and sharply pointed. Labial palpi: second segment covered with white scales and black hairs, mixed with some black scales; third segment porrect, with a blunt point, much thicker than the shaft of antennae, dorsal side black, ventral side with white and black scales. Thorax and abdomen: dark brown, hind tibiae with a pale yellowish hair pencil. Forewing: 22.5 mm in length, dorsal side dark brown, spots white; apical spot in space r₄ closer to the one in r₃ than to that in r₅; strip in space sc shorter than half length of widest portion of cell spot; cell spot big, rectangular, inner edge straight and outer upper angle concave; spot in space cu₁ narrower and longer than cell spot, its outer lower angle protrudent, overlapping with cuniform spot in space m₃; under spot in space cu₁ there are two separated spots in space cu₂, of which the lower one moved inwards; all apical and discal spots are accompanied by dark shadows. Ventral side of forewing, white spots repeat those on above, except there is a white strip in space c before the one in sc. Hindwing dark brown dorsally, basal area covered with hairs; discal area with a series of black spots from space sc+r₁ to cu₂, of which the two in spaces m₁–m₂ longer and looked like an equal sign, and the two in cu₂ blurred; cell with an obscure black spot. Ventral side, all spots in discal series clearly present, base of space sc+r₁ with black spot, cell spot distinct and bigger than all other spots. Cilia on forewing dark brown, mixed with milky white at end of the upper half of space cu₂; cilia on hindwing milky white.

Figures 1–3. 

Adults of Coladenia buchananii separafasciata Xue, Inayoshi & Hu, ssp. n. 1–2 male 3 female a dorsal side b ventral side. Scale bar: 1 cm.

Figure 4. 

Male adult of Coladenia buchananii separafasciata Xue, Inayoshi & Hu, ssp. n. in the nature. Photo by Hua-Lin Hu at the type locality, 17 April 2013.

Male genitalia (Figs 5–12). Tegumen produced forwards and dorsally humpy in lateral view. Uncus beak-like with a sharp point in lateral view, tapered and elongated to a short finger-like blunt tip in dorsal view; its base with an auriform process on each side. Gnathos arm-like in lateral view, connected on ventral side, its tip with tiny teeth. The upper half of the ring straight, and the lower half curved. Saccus very short. Valva broad, trapezoidal, with its distal portion widely bifid into two branches, of which the upper one short and curved downwards, decorated with small teeth, the lower one elongated and curved upwards, its tip with tiny teeth. Aedeagus a little shorter than ventral margin of valva; in lateral view, coecum penis slender and curved upwards, with a rounded head; subzonal sheath shorter than suprazonal sheath; left side of the middle of suprazonal sheath bear a leaflike sheet, its edge with sawteeth. Juxta cordiform.

Figures 5–12. 

Male genitalia of Coladenia buchananii separafasciata Xue, Inayoshi & Hu, ssp. n. 5 ring, lateral view 6 uncus, dorsal view 7 gnathos, ventral view 8 right valva, inner view 9 left valva, outer view 10 aedeagus, dorsal view 11 aedeagus, lateral view 12 juxta.

Female (Fig. 3). Similar to male. Forewing 22.5 mm in length, strip in space sc longer than half length of widest portion of cell spot; end of abdomen with dense gray hairs.

Female genitalia (Fig. 13). Papillae anales reniform, covered with short hairs. Apophyses posteriors a little longer than papillae anales. Lamella postvaginalis wide, with flat edge. The middle of the edge of lamella antevaginalis widely V-shaped. Sternum of seventh segment of abdomen sclerotized into a solid plate, with its posterior edge shallowly coved. Ductus bursae and bursa copulatrix bursiform, membranous, without signum.

Figure 13. 

Female genitalia of Coladenia buchananii separafasciata Xue, Inayoshi & Hu, ssp. n., ventral view, with a close-up view of the apophyses posteriors.

Holotype: male, dry pinned, with genitalia preserved in glycerin. China: Jiangxi Province, Longnan County, Jiulianshan National Nature Reserve, Xiagongtang, 600 m, 7 May 2013, leg. Hua-Lin Hu. Paratypes: 1 male, ditto, 2 May 2013; 1 female, dry pinned, IOZ(E)1687887, with genitalia preserved in glycerin. China: Fujian Province, Jiangle County, Longqishan, Lishan, 650 m, 20 May 1991, leg. Hong-Xing Li.

China (S. Jiangxi, W. Fujian).

Eleven male specimens of Coladenia buchananii buchananii (de Nicéville, 1889) were collected from Thailand by the second author of this paper, two of them were dissected and illustrated herein (Figs 14–15, 16–23). According to these specimens and the images of female Coladenia buchananii in literature (de Nicéville 1889, Swinhoe 1912–1913, Ek-Amnuay 2006), the nominate subspecies is distinguishable from the new subspecies by the following combination of characters:

1. Ground color on both sides of the wings is paler.

2. On the dorsal side of forewing, the discal spots closely connected with each other and formed a wide band; the strips in space c and space sc combined into a wide bar, longer than half the length of the widest portion of cell spot. On the ventral side of forewing, the discal band reaches Costa.

3. Cilia on hindwing is milky white before the end of vein M₁, and brown from the end of vein M₁ to the tornus.

4. The base of uncus in male genitalia without auriform process.

5. The coecum penis of aedeagus is thicker and shorter, not conspicuously constricted before the head.

Figures 14–15. 

Male adults of Coladenia buchananii buchananii de Nicéville, 1889. a dorsal side b ventral side. Scale bar: 1 cm.

Figures 16–23. 

Male genitalia of Coladenia buchananii buchananii de Nicéville, 1889. 16 ring, lateral view 17 uncus, dorsal view 18 gnathos, ventral view 19 right valva, inner view 20 left valva, outer view 21 aedeagus, dorsal view 22 aedeagus, lateral view 23 juxta.

Year round collecting indicates that this new subspecies is probably univoltine, only known from mid April to mid May, about one month later than the nominate subspecies which mainly appears from mid March to mid April. The two male types were captured at roadside, very near to a residential area in Jiulianshan National Nature Reserve.

The subspecific epithet is a combination of the prefix separa- and the Latin fasciata, referring to the broken band on forewing.

According to Fan and Wang (2006), Coladenia neomaeniata is different from C. maeniata in having the valva of the male genitalia conspicuously narrowed distally, and the inner edge of the spot in space sc+r₁ on hindwing not in line with that of the cell spot. The first author of the present paper examined some specimens from northwest Yunnan which have the same wing pattern as C. neomaeniata, and found that the valva of the male genitalia is bowl-like (Figs 24, 25), and its inner side looks different depending on the angle of view (Figs 26–29): from a certain angle to see, its distal part is narrowed as shown by figure 5 in Fan and Wang (2006) (Fig. 27), but from another view angle, it agrees with the figure provided by Evans (1949) (Fig. 26); besides, figure 6 in Fan and Wang (2006) is the dorsal view of the valva, not later view. Thus, the male genitalia of C. neomaeniata is actually identical to that of C. maeniata. Moreover, C. neomaeniata is in the distributional range of C. maeniata (Evans 1949, Fan and Wang 2006), so their difference in the position of the spot in sc+r₁ on hindwing should be considered as intraspecific individual variation rather than subspecific differentiation. Such variation also appears in the shape of the spot in space sc on forewing which changes from a tiny dot to a long strip (Fan and Wang 2006, Oberthür 1896) (Fig. 30), and also in the spots in spaces m₁ and m₂ which may be fully developed (Fig. 31), vestigial (Oberthür 1896) or absent (Fan and Wang 2006). Therefore, C. neomaeniata is treated as a junior synonym of C. maeniata herein.

Figures 24–29. 

Right valva of the male genitalia of Coladenia maeniata Oberthür, 1896. 24 dorsal view 25 ventral view 26–29 inner side from different view angle.

Figures 30–31. 

Male adults of Coladenia maeniata Oberthür, 1896. a dorsal side b ventral side. Scale bar: 1 cm.

Fan and Wang (2006) recorded the distribution of C. maeniata in southeast Xizang. We have not found any information from their work and other literature which shows this species is distributed in southeast Xizang, except that the type locality was recorded as Maenia, E. Tibet (Elwes and Edwards 1897). But the geographic range of Tibet in old entomological literature is much bigger than that of Xizang (= Tibet Autonomous Region) in nowadays. According to Elwes and Edwards (1897), Maenia is a place near Ta-tsien-lo, viz. Ta-tsien-lu, which is now known as Kangding area in west Sichuan Province, not in the range of Xizang. Then, the distribution of C. maeniata should be clarified as northwest Yunnan and west Sichuan (Evans 1949).