JANUARY 3 1862. 187 



Hybroma, new gen. 



The venation and form of the hind-wings are much like 

 that of Tenaga. The costal vein enters the costa about its 

 middle. The subcostal is simple, almost obsolete posteriorly. 

 The discal vein is central, much attenuated behind, giving 

 rise behind the middle of the wing to a branch to the inner 

 margin, attenuated at its base, and at the apical third of the 

 wing becomes bifid, sending one branch to the costa above the 

 tip and the other to the inner margin beneath it. The median 

 runs straight to the inner margin and is two-branched. With- 

 out discoidal cell. 



Fore-wings ovate-lanceolate ; the subcostal vein is much 

 attenuated from its middle and gives rise to a costal branch 

 behind the basal third and forms a rather large secondary cell, 

 the branch forming it almost obsolete, and from its hinder 

 end throws off three costal branches nearly equi-distant. 

 Beneath these arises the apical branch, which is simple and 

 delivered to the costa behind the tip. Two other branches 

 are given off from the disk to the inner margin beneath the 

 tip. Median vein three-branched. Submedian simple. Dis- 

 coidal cell fusiform, rounded behind. 



Head and face rough, hairy. Without ocelli. Eyes very 

 small, hemispherical. Antenna? rather more than half 

 so long as the fore-wings, setaceous and simple. Labial 

 palpi slender, cylindrical, much separated ; middle joint with 

 short terminal bristles ; terminal joint nearly as long as the 

 middle, deflected. Maxillary palpi long , folded, four or five 

 jointed. Tongue very short, reaching to the end of the 

 middle joint of labial palpi. 



Uty\> llio H- servulella. Head and palpi pale yellow, the latter fus- 

 cous beneath. Antenna? dark fuscous. Fore-wings sulphur- 

 yellow, with a dark fuscous streak along the costa from the 

 base, slender at first, but enlarged into a spot about the 

 middle of the costa ; a band of atoms of the same hue, com- 

 mencing on the costa at the beginning of the apical cilia, and 



