174 A. R. Grote's Notes on the Zi/gseniclse of Cuba. 



prominent feature in the ornamentation of the species. In the lower 

 genera, this swelling is small and not always easy of apprehension, but 

 I am led to believe in its existence in all the genera of the sub-family. 

 Thus from its open and prominent appearance in Horama, to its most 

 degradational expression, we have a fresh character for classification, 

 and an additional aid in the arrangement of the genera. I am pre- 

 sently unacquainted with the function or the internal organization of 

 this development. It is noticed cursorily by Guerin and Harris; the 

 foryier, in his description of Phylloecia, Guerin, says of it: "Ton voit 

 chez les males a la base de l'abdomen, deux poches renflees, ouvertes 

 en dessous et analogues a celles des cigales." I have not verified the 

 sexual value of these lateral abdominal pouches, since they appear to 

 me to be generally common to either sex, while the comparison made 

 by M. Guerin with the Hemipterous Cicadi, is original and full of in- 

 terest. 



In the present Collection I find a solitary species belonging to the 

 Family iEgeriidre, which latter, following the SphingidfB, should pre- 

 cede the Zygaenidre and Bombycidas. The specimen is catalogued by 

 Prof. Poey among the Zygaenids of the Collection, from which we can 

 separate it by its peculiar family characters, and bears an etiquette with 

 the number 4G7. To distinguish it from those genera of the Zyo;a3- 

 ninse, which copy iEgeria* in their vitreous and elongate wings, we 

 look to the heavy globose thorax, which is extended in front for more 

 than half its length before the insertion of the wings; to the narrow 

 primaries with their parallel costal and internal margins, and to the ce- 

 phalic characters of the iEgeriidae, while the neuration is in this case 

 indicative of its position, since it assumes a family type. Elsewhere, I 

 have not found the neurational characters to be so positive as in the 

 iEgeriidae, and then they are rarely to be found useful as family cha- 

 racteristics, from a want of fixidity of type, which renders them com- 

 paratively useless in Groups above genera. Since the Cuban specimen 

 is defective, I do not determine the species, which appears to me to be 

 hitherto undescribed. 



The genera Callalucia,f Grote, and Eupsychoma.| Grote, from Col- 

 orado Territory, belong to the Zygaminae. 



* In refering Cosmosoma omphah, to the genus JEgcria, Say has overlooked 

 these characters and classified the moth on its analogical resemblance. 

 ■f C. vermiculata, Grote. J E. geometrica, Grote. 



