134 
Aulacus flavijpennis, sp. nov. 
Luteus, antennis, pedibus posticis abdomineque, nigris, 
alis flavis, apice fumatis, stigmate nigro. Mas, 
Long : 17 mm. 
Antennae scarcely so long as the thorax and abdomen 
united; closely pilose, the scape with a few long hairs; the 
third joint considerably shorter than the fourth ; the apical 
joints piceous on the under side. Head shining, impunctate, 
closely covered with golden yellow hair, tips of the mandi- 
bles and sometimes the labrum in the middle, black ; palpi 
yellow. Thorax coarsely rugose, running into course reticu- 
lations on the pleurae, scutellum and metathorax ; the 
mesothorax in front transverse, coarsely transversely 
striated ; perpendicularly excavated ; covered thickly with 
golden yellow pubescence ; prothorax impunctate, smooth. 
Abdomen shining, impunctate, covered with a depressed pile, 
except on the basal two segments, and not so conspicuously 
on the base of the other segments; the basal half of the first 
segment pale yellow. Legs at the base pilose, the tibiae and 
tarsi with a closer and shorter pile ; the coxae transversely 
striated, the hind coxae are luteous at the base ; the base of 
hind femora and knees are testaceous. 
There are two forms of this species (at least I can find no 
other valid points of distinction between them beyond the 
difference in the colouration of the wings). One (and this 
is also smaller in size) with a small cloud below the stigma, 
and a narrow irregular cloud along the edge ; the other with 
the wings violaceous from a little before the base of the 
stigma, and with a lighter cloud in the second cubital 
cellule and in the radial below the apex of the stigma. The 
second recurrent nervure is received not far from the second 
transverse cubital. The latter is largely bullated. 
Aulacus signatus, Shuckard (also from Ceylon) resembles 
this species, but has the head and thorax black. 
Dekaya, Ceylon (Mr. George Lewis). 
