Coronagathis cornifera, van Achterberg, Cornelis & Long, Khuat Dang, 2010

van Achterberg, Cornelis & Long, Khuat Dang, 2010, Revision of the Agathidinae (Hymenoptera, Braconidae) of Vietnam, with the description of forty-two new species and three new genera, ZooKeys 54, pp. 1-184 : 39-41

Coronagathis cornifera sp. n. Figs 103-110

Type material.

Holotype, ♂ (RMNH), "N.W. Vietnam: Tonkin, Hoang Lien N.P., 10 km, SW Sa Pa, c. 1550 m, 22-29.x.1999, Malaise traps, C. van Achterberg & R. de Vries, RMNH’99”.

Diagnosis.

Except for the aberrant scutellum and axillae it may be confused with aberrant species of the genus Disophrys Foerster because of the carinae of the frons (present and running to the lateral ocelli), the more or less angulate hind trochantellus and the elongate hind leg. However, it is separated from Disophrys by the size of the subbasal cell of the hind wing (narrower than plical lobe (Fig. 109; about as wide as plical lobe in Disophrys ) and the short vein M+CU of the hind wing (distinctly shorter than vein 1-M versus at least subequal in Disophrys ). Superficially similar to the genus Euagathis Szépligeti, but the scutellum bears a pair of large horns (Fig. 110; absent in Euagathis ), the frons has lateral carinae (Fig. 105; absent in Euagathis ), the hind trochantellus is more or less angulate ventrally (rounded ventrally in Euagathis ) and the subbasal cell of the hind wing is narrower than the plical lobe (Fig. 109; subequal in Euagathis ).

Description.

Holotype, ♂, length of body 6.3 mm, of fore wing 6.2 mm.

Head.

Antennal segments 47, length of third segment 1.5 times fourth segment, length of third, fourth and penultimate segments 3.2, 2.2 and 1.4 times their width, respectively; length of maxillary palp 0.7 times height of head; head in dorsal view 2.9 times as wide as its median length; in dorsal view length of eye 1.5 times temple; temple nearly straight behind eyes (Fig. 105) and spaced finely punctate; POL:OD:OOL = 10:5:8; clypeus, face and vertex coarsely areolate-punctate; face with long setae; clypeus strongly convex; frons largely smooth, rather deep near antennal sockets, lateral carina running from near antennal socket to posterior ocellus (Fig. 105); pair of crests between antennal sockets lamelliform, strongly protruding, parallel-sided, slightly higher than protruding outer rim of antennal sockets.

Mesosoma.

Length of mesosoma 1.5 times its height without spine; subpronope large and deep, epomial carina strong; side of pronotum shiny smooth anteriorly, upper side largely punctate, crenulate posteriorly; area near lateral carina of mesoscutum wide, strongly crenulate; side of mesoscutum long rugose-punctate; medio-posteriorly impressed, largely crenulate, its middle lobe long, almost parallel-sided laterally, without a pair of shallow grooves or a median carina anteriorly; notauli wide and strongly crenulate (Fig. 110); scutellar sulcus wide and deep with one carina; scutellum areolate-rugose with long setae; subposterior carina evenly curved, wide and raised, forming a pair of strong lateral long horns (Fig. 110); prepectal carina lamelliform; mesopleuron below sulcus largely densely coarsely punctate and above sulcus more spaced punctate; precoxal sulcus wide, rather shallow and strongly crenulate; metapleuron largely coarsely vermiculate-rugose with dense long setae; mesosternal sulcus shallow and narrowly crenulate; propodeum shiny, largely smooth medially, with coarse carinae but without areola, costulae partly present; propodeum with large postero-dorsal tooth-like protuberance (Fig. 108); spiracle rather large, elliptical, close to latero-basal corner of propodeum and twice as long as wide.

Wings.

Fore wing: second submarginal cell quadrate, with an indistinct ramellus (Fig. 109); r:3-SR:SR1 = 4:7:80; 2-SR:3-SR:r-m = 13:7:11; apical half of subbasal cell sparsely setose. Hind wing: M+CU 0.6 times as long as 1-M; no 2-M; surroundings of cu-a glabrous.

Legs.

Hind femur 0.9 times as long as hind tibia; hind tibia distinctly compressed basally and widened apically; length of hind femur, tibia and basitarsus 5.0, 6.0 and 7.0 times their width, respectively; hind femur and tibia largely punctate, but partly pimply, with short setosity; middle tibia with two small pegs; length of outer and inner spurs of middle tibia 0.4 and 0,5 times middle basitarsus, respectively; length of outer and inner spurs of hind tibia 0.4 and 0.6 times hind basitarsus respectively; fore and middle tarsi slender.

Metasoma.

First tergite 2.2 times as long as its apical width, smooth and subparallel-sided apically (Fig. 107); second tergite without a transverse depression and second metasomal suture almost absent.

Colour.

Body black; wing membrane rather dark brown and without a stigmal spot (Fig. 103); mandible, palpi, fore and middle legs (but coxae rather brownish) pale yellow; pterostigma, veins and metasoma largely dark brown.

Distribution.

NW Vietnam: Lao Cai.

Etymology.

From “cornu” (Latin for “horn”), and “fero” (Latin for “carry”), because of the lateral horns of the scutellum.