178 MONOGRAPH OF THE 
narrower, as is also the reflexed lobe at the base of the club of 
the antenne. The following is Captain Boys’s description :— 
“Length 6-20ths of an inch. The antennz are composed of two 
joints, of which the last is very large and in the form of a wide- 
mouthed cornucopia, being attached to the first at its basal angle. 
The margins of the upper side are slightly crenulated, and the 
upper surface is rather deeply excavated, giving this part a 
cuspiform appearance. Anterior and posterior margins compressed, 
the latter produced into a blunt recurved tooth. The sides of the 
club are striped with six grooved bands; the eye when seen from 
above appears round, of an irregular oval shape when viewed from 
the side. Head trigonal depressed, with a marginal excavation, 
but no groove on the upper part. The thorax appears as if com- 
posed of two portions, the anterior being angulated and forming a 
rather sharp spine on each side, with its base inserted in the 
posterior part; this latter portion is crenulated, with the exterior 
margins produced and rounded : a sulcus in the form of a bracket 
crosses the centre. The elytra are black, broadly patched ante- 
riorly with brownish sienna; the posterior margin has a faint 
undefined line of the same colour, which blends into the general 
black of the wing-cases. The follicles at the exterior margin of 
the elytra posteriorly are much produced, and close to them on 
each side is a very curious moveable spine (pl. 90, fig. 6 6), slightly 
incurved and projecting over the latter segment of the abdomen 
(fig. 6a). Body beneath a bright chesnut; head, antenne, and 
thorax livid brown: all the joints in the tarsi are simple, cylin- 
drical, furnished beneath with hairs, and of five joints in each leg, 
the first small, the last longest. 
“« Note.—Taken accidentally, while sweeping in high grass, with 
a net, under a Munja clump (Saccharinum Munja). On with- 
drawing this insect from the net, it gave two very distinct 
explosions, leaving the ordinary black stain on my fingers; the 
abdomen also swelled very much when submitted to the hot water 
process.” Upon being plunged into hot water, “a erepitation may 
be heard, and the abdomen becomes greatly distended, probably 
by rarefaction of air contained in vessels which give their assistance 
in its explosive powers, and the part retains the inflated appearance 
until a small perforation is made in it with a needle’s point or 
such-like instrument, which, allowing the escape of the confined 
