1863.] 
355 
cate, whilst Rho;mn)\ and its group, have them slightly rounded ; their 
neuration is also distinct. The two exceptions mentioned I have erected 
into a new genus Kricogonia^ the diagnosis of which follows. 
KKICOGONIA, nov. gen. 
Head, broad, clothed with erect hairs. 
Eges^ round, projecting. 
Lahial palpi^ longer than the head, clothed with short scales ; 
the first joint, curved, compressed internally; the second, oval, sub- 
cylindric, of about the same length as the first, compressed internally; 
third joint, elongate, minute. 
Antennde^ short, rather slender, grooved below, enlarging from the 
lower third towards the apex, more abruptly clavate than in the Ame¬ 
rican species of Gronepteryx. 
Thorax, stout, covered with fine long hairs. 
Wings, destitute of prominent angles, and more or less rounded. 
Anteriors^ sub-triangular; costa slightly curved at the base; cos¬ 
tal nervure, very stout; sub-costal, four branched; its first nervule, 
thrown off near the middle of the cell; the second, just above the end 
of the cell; the third midway between the end of the cell and the apex 
of the wing; the first discoidal nervule confiuent with the sub-costal, 
for some distance beyond the cell; middle disco-cellular, one-half or 
more the length of the lower. Sub-median nervure curved downwards 
near the base. Internal nervure, short, running into the sub-median. 
Posterior iDings^ obovate, shoulder very prominent. First sub¬ 
costal nervule curved outwardly; discoidal nervure does not appear to 
be a third sub-costal nervure, as in Gronepteryx; upper disco-cellular 
nervule more than half the length of the lower; abdominal channel 
very distinct and ample. 
Abdomen, rather stout, not so long as the abdominal margin of the 
posterior wings. 
Legs, short; claws moderately bifid; paronychia about as long as 
the claws. 
I have taken G. Igside as the type of a new genus, dilfering from 
Goneptergx in many particulars. Its nervular arrangement is widely 
distinct, requiring the greatest allowance to make it correspond with 
the diagnosis of Goneptergx; excepting G. Leachiana^ it was the only 
