1«(J2.] 137 



H. servulella.^Head ami paljii jialc yellow, the latter fuscous beneath. Aiiten- 

 ufe 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 Xhe same hue, commencing on the costa at the 

 beginning of the apical cilia and a streak of the same hue along the inner margin, 

 with its hinder end turned up obliquely towards the costa. Hind wings dark 

 brownish. 



Taken on wing 18th of July. 



The venation of EiuJarcia, Ttitaija and Ilj/bronui are much alike, par- 

 ticularly that of the hind wings ; the species included in them are congen- 

 eric and to the group thus formed, that of Diachorisia may be likewise 

 added. If we disregard the significance of venation, the number of gen- 

 era can be reduced. But nature does not make variations of structure 

 without attaching to the change some difference of habit, some distinction 

 in the biography of the individual. I have no doubt of the naturalness 

 of the genera and they are probably peculiar to our own country. 



DYSODIA Clemens. 

 Proc. Acad. Nat. Sci. Aug. 1860, p. 349. 



D. margaritana. — Head black, with two pale yellow spots behind the antennae. 

 I'al2ii jiale yellow, black above. Anteunffi black. Prothorax pale yellow. Fore 

 wings black, with a double, translucent, yellowish-white discal spot extending 

 nearly across the wing and six dots of the same hue along the costa. Beneath the 

 fifth costal dot are three round spots of the same hue, the middle one, larger than 

 the others. Cilia black, with a white spot beneath the tip and one at the in- 

 ner angle. Hind wings black, with a large, translucent, yellowish-white discal 

 spot and two round dots of the same hue between it and the hind margin. Cilia 

 black, with two white spots about the middle of the hinder margin. Tegulce pale 

 yellow. Hind tibiee with a pale yellow, central band. Abdomen black, with a 

 dorsal, jjale yellow stripe on the basal segment, white in the middle above, and 

 with two white dots on each side, one about the middle, the other near the end. 



From Illinois (Mr. Robt. Kennicot). Florida (Mr. Edward Norton). 



