Genus Corethra. 
297 
silvery; antennae pale ochraceous, with scarcely any trace of 
banding and dark verticillate hairs. 
Thorax pale grey, with two broadish chestnut-brown median 
lines separated by a narrow pale line, with two broad lateral 
lines on the posterior half of the mesothorax, the space between 
them and along the sides and between the two median lines 
A. B. 
Fig. 297. 
A, Thorax and cross-veins of Corethra plumicornis ; 
B, of Corethra culiciformis. 
chestnut-brown; golden-brown bristles over the roots of the 
wings and narrow curved hair-like scales on the mesonotum ; 
scutellum pale ochraceous, with a compound border of golden- 
brown bristles; metanotum chestnut-brown, with darker centre ; 
pleurae pale ochraceous. 
Abdomen pale yellowish to testaceous-brown, with long golden 
hairs, posterior borders of the segments with a narrow dark rim. 
Legs ochraceous, with dark hairs, slightly dusky on the tarsi: 
ungues equal, small, and brown in the 9 • 
Fig. 298. 
Corethra culiciformis (9). (X. 9.) 
Wings with a yellowish tinge, with dull yellowish hair-like 
scales and yellow veins; the posterior cross-vein on a level with 
the mid cross-vein; the first sub-marginal cell a little longer and 
