Length:
body 4.9-9.3 mm,
fore wing 5.0-9.5 mm.
head:
clypeal margin blunt laterally, with a slightly protruding, sharply pointed median
tooth (Fig. 2).
clypeus about 2.1-2.3 times as broad as long, flat in profile, not distinctly separated from face (
1,
2,
3) by a distinct
sulcus dorsomedially (Fig. 2). Anterior tentorial pits oval, with lateral corners downturned. malar space (
1,
2) about equal in length to basal width of
mandible.
mandible with ventral
tooth slightly longer than the dorsal, ventral
tooth distinctly separated into an upper, more basal, blunt
area and a lower extended apex, sides of
mandible almost parallel.
mouthparts haustellate (Fig. 3):
glossa, postmentum (
1),
galea, and stipes (
1,
2,
3) all narrowly elongate. face (
1,
2,
3) 0.9 to 1.1 times as wide as long, smooth, lightly to quite strongly pubescent, with a median
tooth or small
tubercle dorsally. Inter-antennal
area flat to narrowly raised medially, anterior
margin of torulus (
1,
2) situated at about 0.6-0.7 of
eye height. Widest diameter of torulus (
1,
2) slightly wider than widest diameter of
median ocellus.
area between lateral ocelli flat to slightly depressed, distance between lateral ocelli 0.7-1.1 times their widest diameter, distance from
lateral ocellus to
eye margin 1.2-1.5 times widest diameter of
lateral ocellus.
area behind ocelli sharply declivitous. Antennae with 31-36 flagellomeres, longer than
body.
first flagellomere with a small tyloid (
1) laterally, length of
second flagellomere 0.6-0.8 times length of first.
occipital carina present only as an indistinct vestige at mandibular base, never joining
hypostomal carina at or before mandibular base.
pronotum dorsally with distinctly impressed transverse groove (
1,
2), anterior
margin of
pronotum strongly emarginate and exceptionally narrow dorsomedially, abruptly upcurved and broadly rounded laterally. Lateral groove (
1,
2) of
pronotum extremely vestigial dorsally, absent ventrally.
pronotum usually impunctate. mesoscutum (
1,
2) glabrous, pubescence extremely sparse or absent; notauli absent.
epicnemial carina extending dorsally along ventral 0.3 of
pronotum, inclined to, but never reaching anterior
margin of mesopleuron (
1,
2). mesopleuron (
1,
2) lightly pubescent, smooth to very lightly punctate. propodeum (
1,
2,
3) (Figs 7, 8) with pleural carinae largely absent, represented by a short vestige posteriorly, lateral longitudinal carinae sometimes present as posterior vestiges; propodeum (
1,
2,
3) impunctate, laterally pubescent. Posterolateral
edge of propodeum (
1,
2,
3) somewhat upcurved.
hind trochanter 2.2-2.5 times as long as basally wide, apical
margin of
hind trochanter reaching apical
margin of
trochantellus. Claws fully pectinate (Fig. 6) .
fore wing (Fig. 4) with
abscissa of Cu1 between 1m-cu and 2cu-a about 0.7-0.8 times length of 2cu-a. Marginal cell (
1,
2) about 3.1 times as long as wide.
hind wing (Fig. 5) with distal
abscissa of 1A vestigial, not reaching beyond 0.3 times distance to
wing margin. T1 (Figs 8, 9) about 2.2-2.3 as long as posteriorly broad, spiracles slightly protruding in profile. Cerci quite prominent. Color. Bright yellow with black markings, wings hyaline to yellowish, distal part sometimes brownish-infumate.
