Euagathis flavosoma, 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 : 61-64

Euagathis flavosoma sp. n. Figs 172-181

Type material.

Holotype, ♀ (IEBR), Aga. 264, "S. Vietnam: Tay Ninh, Lo Go-Xa Mat N.P., forest, 7.xi.2003, K.D. Long".

Diagnosis.

This species is close to Euagathis leptocera Cameron, 1907, from East Malaysia, but the new species differs by having the third segment of fore tarsus about as long as wide (Fig. 177; Euagathis leptocera : about 1.5 times longer than wide), a short ramellus ( Euagathis leptocera : hardly developed); the metasoma reddish-yellow (leptocera: yellowish-brown) and the scutellum rugose-punctate (leptocera: coarsely punctate). The new species is also similar to Euagathis forticarinata (Cameron), but it differs by having vein M+CU about 0.4 times vein 1-M ( Euagathis forticarinata : about 0.5 times); first tergite of female 1.3 times as long as apical width (forticarinata: 1.5-1.9 times) and second-fourth middle tarsal segments robust (forticarinata: moderately slender).

Description.

Holotype, ♀, length of body 10.1 mm, of fore wing 11.2 mm.

Head.

Antennal segments 59, length of third segment 1.2 times fourth segment, length of third, fourth and penultimate segments 2.1, 1.8 and 1.7 times their width, respectively; length of maxillary palp 1.3 times height of head; in dorsal view length of eye 1.3 times temple; temple concave laterally and distinctly narrowed (Fig. 180); POL:OD:OOL = 7:6:19; face and vertex smooth; malar space densely setose (Fig. 179); pair of crests between antennal sockets convergent, and higher than rim of antennal sockets.

Mesosoma.

Length of mesosoma 1.4 times its height; subpronope large and deep; side of pronotum shiny and smooth; area near lateral carina of mesoscutum smooth; side of mesoscutum smooth, middle lobe with sparse fine punctures anteriorly; medio-posteriorly flat, slightly impressed, shiny and smooth; notauli shallow and smooth (Fig. 174); scutellar sulcus long, 1.1 times as long as scutellum (17:15); scutellum rugose-punctate; subposterior crest strong and curved (Fig. 174); mesopleuron below precoxal sulcus with sparse distinct punctures, and above sulcus almost smooth; precoxal sulcus wide, shallow and coarsely crenulate (Fig. 178), 3 anterior crenulae connected to prepectal carina; metapleuron punctate anteriorly and rugose-punctate posteriorly; propodeum with strong carina basally, large areola and costulae present; propodeal spiracle elongate, subelliptical, 2.3 times as long as wide; distance between spiracle and lateral carina 1.3 times as long as width of spiracle.

Wings.

Fore wing: second submarginal cell pentagonal, distinctly narrowed anteriorly, with short ramellus (Fig. 173); r:3-SR:SR1 = 13:5:125; 2-SR:3-SR:r-m = 24:5:21. Hind wing: vein M+CU rather short, 0.4 times as long as 1-M (40:90); surroundings of cu-a sparsely short setose.

Legs.

Length of hind femur, tibia and basitarsus 4.0, 7.3 and 8.8 times their width, respectively; hind femur (as remainder of legs) with short and dense setosity (Fig. 176); outer side of apex of hind tibia with 3 pegs; length of outer and inner spurs of middle tibia 0.3, and 0.5 times their basitarsus, respectively; length of outer and inner spurs of hind tibia 0.3 and 0.6 times their basitarsus; fore and middle tarsi robust (Fig. 177); hind spurs distinctly widened basally; first-third hind tarsal segments with a carina-like row of special short strong setae ventrally.

Metasoma.

First tergite rather short, strongly widened apically (Fig. 175), smooth; length of first tergite 1.3 times its apical width, without sublateral depressions; second metasomal suture absent (Fig. 175); ovipositor sheath short, truncate apically, 0.6 times as long as inner hind tibial spur.

Colour.

Brownish-yellow; antenna yellowish-brown, but scapus brownish-yellow; fore wing yellow, with a dark brown stigmal spot (Fig. 173); veins 2-SR+M and basal third of 1-M dark brown; hind wing yellow, slightly infuscate apically.

Distribution.

S Vietnam: Tay Ninh.

Biology.

Unknown.

Etymology.

From “flavus” (Latin for “yellow”), and “soma” (Greek for “body”), because of the yellow body.