5i Colonel C. Swinhoe on 



Walker's genus Otrocda becomes a synonym, and as liesperia 

 is a Lymantrid, another name must be found for the species 

 hitherto erroneously referred to Nydemera. 



This is not far to seek ; Hllbner's next genus Dciloncra 

 contains a single species only, cvcrgista, Cram., and about 

 tliis type there can be no mistake. 



For some of the other species in this genus five genera 

 have been erected by different authors. I have had one 

 or two examples of species in each genus denuded of their 

 wing scales, and after carefully working through the species 

 have come to the conclusion that structuially there is no 

 essential difference* betAveen them, and that the genus 

 Dcilemcra, Hilbner, must include them all. 



Tlie scheme of ueuration of the fore-wings is practically 

 the same throughout ; the length of the areole, by which 

 Hamjoson separates Dcilemcra from the rest of the species, 

 appears to be as variable as its breadth, in fact both its size 

 and shape vary not only in individuals of the same species, 

 but in the right and left wing of the same individual. 



In the hind-wings veins 6 and 7 are generally stalked ; 

 in the few instances where 6 and 7 arise from the cell, this 

 difterence is found to be correlated with a difference in the 

 structure of the antennae and palpi, and may be legitimately 

 employed for the purposes of sub-division ; thus the sjDecies 

 included under Pitasila, Moore, and Atasccc, Swinhoe, which 

 have veins 6 and 7 arising from the cell, agree in also 

 having the palpi much shorter than the others, Atasca 

 being separated from PitasUa by the antennae in both 

 sexes being simply pubescent, with a short bristle from 

 each joint, whereas in Pitasila they are bipectinate in both 

 sexes, the pectinations being short. 



In the large majority of cases, those with veins G and 7 

 of the hind-wings stalked, with longer palpi and more fully 

 pectinated antenna?, secondary sexual characters are avail- 

 able for sub-division ; thus a few species with cvcrgista, 

 Cram., the type of the genus, have in the male the inner 

 margin of the fore-wings strongly convex, and the inner 

 margin of hind-wings amplified and containing a fold and 

 furrow, the outer margin produced and straight from the 

 anal angle, not rounded, so that the hind-wing becomes 

 oblong in shape. 



Again in ccActa, Cram., the fore tibia in the male bears a 

 long pencil of hairs, and the species is further separated by 

 * Except in coleta, where vein 11 is short stalked with 9 and 10. 



