New records of the genus Iporhogas Granger (Hymenoptera, Braconidae, Rogadinae) from Vietnam, with description of four new species

Abstract The genus Iporhogas Granger, 1949 (Braconidae: Rogadinae) is recorded for the first time for Vietnam. Four new species of the genus Iporhogas, viz. Iporhogas albilateralis sp. n., I. contrastus sp. n., I. simulatus sp. n. and I. tricoloratus sp. n., from Vietnam are described and illustrated, and additionally, one species, Iporhogas guangxiensis Chen & He, 1997, is newly recorded for Vietnam’s fauna of the family Braconidae. A key to the five Vietnamese species of the genus Iporhogas and a checklist with distributions of the ten species are provided.


Introduction
The Rogadinae is one of the largest subfamilies of Braconidae, as far as known spe cies of this subfamily consists of koinobiont endoparasitoids of lepidopteran larvae in which the host caterpillar is mummified ( van Achterberg 1991;Townsend and Shaw 2009). Little is known of the subfamily Rogadinae from Vietnam, and since 2007, some papers on Vietnamese Rogadinae with description of 17 new species have been published (Long and van Achterberg 2007, 2008a, 2008b. To date only seven genera and 25 species of Vietnamese Rogadinae have been reported in papers scattered in the literature (Long and Belokobylskij 2003;van Achterberg 2008a, 2008b;Butcher et al. 2012).
The genus Iporhogas proposed by Granger (1949) is a small genus of the rogadine braconids, this genus comprises six species, of which five occur in the Oriental region (Chen and He 1997) and one in the Afrotropical region (Granger 1949). Six Iporhogas species were keyed by Chen and He (1997) with five species described and illustrated as new from China, but without any information on their hosts.
For several years the author has been collecting Braconidae from all over Vietnam to gain an understanding of the braconid fauna of Vietnam. In this paper four new and aberrant species of Iporhogas from Vietnam present in the Braconidae Collection of Vietnam National Museum of Nature (VNMN) are described and illustrated. A checklist and the distribution of ten species of the genus Iporhogas are given, in addi tion one species is recorded for the first time from Vietnam, together they represent the first record of the genus Iporhogas for Vietnam.

Material and methods
Specimens studied are deposited in the Collection of the Institute of Ecology & Bio logical Resources (IEBR) and Vietnam National Museum of Nature (VNMN) at Ha Noi, assembled by the author during numerous expeditions in Vietnam. The speci mens of Iporhogas were mainly collected by using sweep nets or malaise traps set in open habitats as secondary or impoverished forests.
Terminology used in this paper follows van Achterberg (1993), sculpture terms are based on Harris (1979), and vein terminology follows the modified ComstockNeed ham system (van Achterberg 1993). For diagnosis of the Rogadinae see van Achterberg (1991); for identification and subdivision of the subfamily, see van Achterberg (1993); for a key to the genera of the subfamily Rogadinae, see Chen and He (1997); for ad ditional references and data, see Yu et al. (2013). The photographs were taken with a Canon G15 camera attached to an Olympus SZ61 binocular microscope at IEBR. Abbreviations used in this paper are as follows: POL = postocellar line; OOL = ocular ocellar line; Od = diameter of posterior ocellus; MT: Malaise trap; 'Rog. + number': code number indexing for specimens of the Rogadinae in the collection; N: North, S: South, NC: North Central, NE: Northeast, NW: Northwest; NP: National Park; NR: Nature Reserve.
Legs. Hind coxa shiny, with oblique fine striae dorsoapically; length of hind fe mur, tibia and basitarsus 4.8, 9.0 and 9.0 times as long as their width, respectively; inner hind tibial spur 0.4 times as long as basitarsus (14:36); hind tarsal claw with large lobe.
Biology. Unknown. Etymology. From "albus" (Latin for "white") and "lateralis" (Latin for "of the side"), because of the white lateral side of the metasoma.
Notes. Iporhogas albilateralis sp. n. can be distinguished from other species by having the hind coxa with oblique striae dorsoapically. The new species differs from I. chinensis Chen & He, 1997, from China by having the precoxal sulcus shallow, punctate; mesopleuron finely and sparsely punctate; metapleuron punctate and vein cua of fore wing distinctly postfurcal. The new species also differs from I. flavistigma Description. Holotype, female, body length 6.1 mm, fore wing length 5.0 mm (Fig. 2).
Legs. Upper side of hind coxa shiny and with sparse fine punctures; length of hind femur, tibia and basitarsus 4.8, 8.4 and 9.0 times as long as their width, respectively; inner hind tibial spur 0.4 times as long as basitarsus (11:30); hind tarsal claw with large lobe.
Mesopleuron of males sometimes with fine transverse crenulae anteriorly; meso pleuron rugosepunctate anteriorly; fore and middle legs pale yellow; hind coxa and femur brown; hind tibia and tarsus yellowish brown; pterostigma and wing veins of males yellow or yellowish brown; first and second metasomal tergites white or ivory, except black spot at base of first and at apex of second tergite; thirdfourth tergites black, except white basal corners; fifth and sixth tergites entirely white.
Notes. Iporhogas tricoloratus sp. n. differs from I. chinensis Chen & He, 1997, from China by having: the ocelli large; metapleuron finely punctate and vein M+CU of hind wing comparatively long, 1.4 times as long as vein 1M. The new species differs from I. flavistigma Chen & He, 1997, from China by having the occipital carina in dorsal view roundly concave; metapleuron finely punctate and hind coxa finely punctate. Notes. Female: body length 5.05.1 mm, length of fore wing 4.2 mm, antenna 6.3 mm; male: body length 4.0 mm, length of fore wing 3.5 mm, antenna 4.5 mm; in dor sal view occipital carina weakly concave (Fig. 32); basal length of second submarginal