of fore wing 1.7-2.6 mm, of body 1.3-2.7 mm.
Colour very variable and similar to that of B. brevicornis:
rather dark brown, with sometimes a large pale basal spot; body nearly completey
yellowish brown to largely dark brown or black. Antenna of female with 13-14
segments, submoniliform (Fig.), shorter than length of head and mesosoma
combined or of equal length (Fig.); antennal of male with 20-23 segments (Fig.);
setae of vertex erect, partly reaching above upper level of posterior ocellus
(Fig.); clypeus nearly flat to convex (Fig.); clypeus, face and frons finely
granulate; face with some long setae (Figs.); vertex mainly smooth. Mesoscutum
largely setose, shiny, smooth; scutellar sulcus narrow and distinctly crenulate.
Vein 3-SR of fore wing 0.9-1.2 times vein r, rarely up to 1.4 times (Fig.);
veins l-SR and 3-SR short (Fig.); marginal cell of fore wing medium-sized,
ending distinctly removed from apex of wing (Fig.); tarsal claws with small
acute lobe (Fig. 199). Propodeum superficially granulate or smooth; length of
first tergite about 0.8 times its apical width, its surface smooth; dorsolateral
carinae of first tergite absent (Fig.); second tergite without mediobasal area;
second metasomal suture shallow to rather deep, nearly straight and usually
smooth (Fig.); second to seventh segments superficially granulate to (mainly)
smooth, shiny; length of ovipositor sheath 0.21-0.30 times fore wing and about
twice length of first tergite.
Can be identified by the following characters: Antenna of female with 13-14
segments, shorter than length of head and mesosoma combined or of equal length;
antennal segments of male 20-23. Setae of vertex erect, reaching above upper
level of posterior ocellus; vein 3-SR of fore wing 0.9-1.2 times vein r, rarely
up to 1.4 times.
polyphagous ectoparasitoid, like B. brevicornis; attacking Crambidae and
pyralidae in stored products, and in the field other lepidopterous families such
as Noctuidae, Tortricidae, and Gelechiidae may also be attacked.
It is a major
parasitoid of the rice moth, Corcyra cephalonica (Stainton), the most
widely used factitious host in Indian commercial insectaries and considered as a
threat to corcyra production.