THE HALACODERMATA. 
175 
sternum. The front and intermediate coxm are trans- 
verse and sunken, with no trochantins ; and the hinder 
pair are but very slightly enlarged on the inner side ; 
it is a very rare species, and has been taken on small 
sticks submerged in a narrow water-course. 
The Lycims have the antennae inserted on the up- 
per side between or before the eyes, and very close 
together ; the mandibles very small, slender, and not 
toothed at the apex ; tho trochanters placed in the 
axis of the femora; and the head produced into the 
form of a rostrum, and covered by the prothorax. 
They are conspicuous for their flattened appear- 
ance; long and ample elytra, with diminished head 
and thorax ; bright colours, and peculiar reticulated 
sculpture. 
Eros Aurora (Plate IX., Fig. 2) is found, at Rannoch, 
in Perthshire, on the under sides of felled pine-trees, 
or among the half-rotten heaps of chips left by the 
woodman. It is a sluggish species, and is readily 
captured, not attempting to escape, though it flies 
heavily towards the evening : the sexes remain coupled 
for some time, the male being the smaller of the two, 
with longer antennas, and having a deep semicircular 
notch on the hinder margin of the last abdominal seg- 
ment. The larva of an allied species has been found 
under bark of dead trees, where it feeds on other 
insects, &c. : it is black, with a red tail ; elongate, 
very flattened, leathery, with slender mandibles which 
are placed very close together, and having two re- 
curved hooks and a retractile prolongation at the apex 
of the body. 
The Lampyeid;e are closely allied to the last family, 
from which they differ, however, considerably in out- 
