Earinus brevistigmus, 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 : 55-57

Earinus brevistigmus sp. n. Figs 151-159

Type material.

Holotype, ♀ (RMNH), "S. Vietnam: Lam Dong, Bidoup Nuiba N.P., n[ea]r Da Lat, Mal. traps 1-12, 1650-1700 m, 11-19.x.2005, C. v. Achterberg & R. de Vries, RMNH’05”.

Diagnosis.

The new species is similar to Earinus burmensis Gupta & Bhat, 1974, from Myanmar, but differs by having the malar space 2.6 times as long as basal width of mandible ( Earinus burmensis :1.8 times); first metasomal tergite 1.2 times as long as its apical width (burmensis: twice); precoxal sulcus absent (burmensis:with adeep depression posteriorly)). The new species is also similar to Earinus bicolor Chou & Sharkey, 1989, from China, but differs by having the metasoma black (bicolor:yellowish red); POL 0.9 times as long as OOL (bicolor:0.7 times) and face distinctly punctate (bicolor:sparsely minutely punctate).

Description.

Holotype, ♀, length of body 3.7 mm, of fore wing 3.3 mm, of ovipositor sheath 0.9 mm.

Head.

Antennal segments 32, length of third segment 1.5 times fourth segment, length of third, fourth and penultimate segments 3.7, 2.5 and 1.5 times their width, respectively; maxillary palp as long as height of head; length of malar space 2.6 times basal width of mandible; in dorsal view length of eye 2.3 times temple (Fig. 158); POL:OD:OOL = 8:4:9; face punctate; frons flat, shiny and smooth, between antennal sockets with a deep groove (Fig. 158); vertex and temple shiny with very sparse minute punctures.

Mesosoma.

Length of mesosoma 1.5 times its height; subpronope medium-sized; pronotum shiny and smooth; area near lateral carina of mesoscutum crenulate; mesos cutum shiny with sparse fine punctures and setae, slightly depressed medio-posteriorly; notauli completely absent; scutellar sulcus 0.7 times as long as scutellum and with 2 carinae; scutellum slightly narrowed posteriorly, sparsely finely punctate; precoxal sulcus absent; mesopleuron shiny, smooth dorsally and with sparse fine punctures ventrally; metapleuron smooth; propodeum with long areola and costulae present, area inside areola with transverse carinae.

Wings.

Fore wing: second submarginal cell triangular (Fig. 155); vein SR1 straight; r:3-SR: SR1 = 2:1:50, r:2-SR:r-m = 2:13:12; vein 1-SR+M medially unsclerotized and only pigmented. Hind wing: vein M+CU subequal to vein 1-M.

Legs.

Length of hind femur, tibia and basitarsus 4.0, 5.5 and 10.0 times their width, respectively; hind femur (as remainder of legs) with short setae (Fig. 156); length of outer and inner spur of middle tibia 0.4 and 0.5 times middle basitarsus, respectively; outer apex of hind tibia with a cluster of 7 pegs; length of outer and inner spur of hind tibia 0.4 and 0.5 times hind basitarsus; tarsal claws without lobe.

Metasoma.

First tergite widened apically, slightly depressed laterally, with short dorsal carinae basally; length of first tergite 1.2 times its apical width (Fig. 154); second metasomal 1.2 times as long as third tergite (Fig. 154); metasoma shiny and smooth but basal half of first tergite faintly striate; ovipositor sheath 0.9 times as long as fore wing, widened apically (Fig. 151).

Colour.

Black; clypeus, palpi, galea, tegulae and legs ivory or pale yellowish, but tarsal claws, apex of hind tibia and second-fifth segments of hind tarsus dark brown; wing membrane infuscate.

Distribution.

S Vietnam: Lam Dong.

Biology.

Unknown.

Etymology.

From “brevis” (Latin for “short”), and “stigma” (Greek for “mark”), because of the short pterostigma.