Description:
Female and Male:
The head is only slightly wider than the thorax, positioned horizontally and slightly curved. The entire frons (forehead) is smooth and without striations, with a slightly concave antennal fossa (the depression where the antennae attach). The compound eyes are large, sparsely covered with hairs, and difficult to observe at 60x magnification. The shortest distance between the two compound eyes is slightly less than the width between them (5:6). The vertex (top of the head) is not angled behind the posterior ocelli (simple eyes), but rather is somewhat rounded, with the area between the temples being slightly curved. The ocelli are arranged in an equilateral triangle, with the area between them being smooth, with a few fine striations and faint reticulations (net-like patterns). The antennae have more than 4 segments. The area behind the compound eyes is slightly elevated.
The thorax is somewhat flattened. The mesoscutum (middle dorsal plate of the thorax) is slightly smooth, with indistinct small spots at the rear. The scutellum (posterior plate of the thorax) is flat and smooth. The postscutellum (plate behind the scutellum) is smooth. The legs are relatively short and thick. The hind wings have a wide fringe of hairs, with the widest part of the fringe being 2/3 the greatest width of the wing.
The abdomen is twice as long as it is wide. The first tergite (dorsal plate of the abdomen) is very broad, with the width significantly greater than the length, and with very deep longitudinal striations. The second tergite has longitudinal striations only at its base.
The male antennae have 12 segments and are filiform (thread-like). The male genitalia have only two broad spines.
The body is black, with the legs, except for the front coxa (basal leg segment) and the last segment of the tarsi (foot), being yellow. The scape (first segment of the antennae) of both males and females is more or less the same color as the legs. The anterior half of the second antennal segment is lighter than the posterior half, with this segment being dark brown.
Size:
Body length: 0.75 mm.
Ecology:
Parasitic in the eggs of Pyralidae (rice stem borer).
Distribution:
Vietnam: Hanoi.
Outside Vietnam: Sumatra.
Type Specimens:
Numerous males and females, Hanoi, 1978. Specimens are stored at the Institute of Ecology and Biological Resources (Hanoi).
| Latin name: | Telenomus olynthus |
| Vietnamese Name: | Ong telenomus olynthus |
| Family: | Scelionidae |
| Order: | Hymenoptera |
| Class (Group): | Butterfly |