39 ' 



men, in fiict (Ik- whole body, is sliorter iiiid siouler in tli(! leiiuile, wliile liie 

 irenital arniiilnrc is widely diHereiil. These are sexual difTerences (o l)e 

 found in all the taniilics ol 'mollis. 



In llic I'hahi'uids occui', as in sonic Bo>nh)/ci(l<i\ namely, Ihe speeies of 

 Oigi/ia, geiieia in \\ liieh \hv I'euiales have only the ludiments ol' winsfs. 

 'I'liere an- also other importani (lifFerenees, which we would draw atlention lo. 



The leniale Hyhcrnia (liil'ds from the male in tiie Ixxly being much 

 shorter and thieker; in the scales being liner and shorter; in the simple 

 antennae and slightly stouter legs. The palpi are of nearly equal size in botii 

 sexes, being remarkably short and lianging down. Denuding the head and 

 thorax, the head is considerably smaller in the female than the male, and tln^ 

 eyes are less rounded. Tlu; front of the head is jjroportionately siiorter anrl 

 broader, and less depressed between the eyes; the epicianinm and clypeus 

 are a little fuller than in the male; the clypeus is shorter and broader than in 

 the male. 



But the most remarkable changes are seen in the female thorax, where 

 the entire fergum ot the thorax is smaller than that of the first abdominal 

 segment. The female thorax of Hi/benua is so much like that of Anlso- 

 j)tenjr that I will reserve further descriptive remarks until the thorax of that 

 genus has been described. 



The head and liody of the females Anisopferyx vcrnuki differ from those 

 of the male, when uudciiuded, much a.s those of the female Hyhrrma from 

 the male. The differences in the head (pi. 7, fig. 26) are much greater in 

 Aninopteryx than in Hybeniia, the head being wider. The head is smaller 

 and much wider in front, and the eyes much smaller in the female than in 

 the male In the female, the occiput is a transverse, narrow rim; the epi- 

 cranium is small, narrow, subtriangular; while the clypeus is subscutellate, 

 as l)road as long, with the front edge narrowing a little, and the margin revo- 

 lute; the surface is rather convex. The thoraces of the male and female of 

 A. pometaria have been engraved. The thorax of the male (pi. 7, fig. 13, Voa) 

 is of the usual form, differing but little from that of Euirapeln. In the female 

 (pi- 7, fig. 14, 14f/), however, the mesoscutuni is ai)out one-fourth as long as 

 wide, the hinder edge beuig slightly e.vcavated ; the scutelluni is very short 

 and wide, transversely narrow lozenge-sha2ie<l. The metathorax is remark- 

 ably short; the distance between the two halves, which an- widely separated, 



