116 JOHX B. SMITH. 



iug it clear and easy of definitiou. The addition of these genera to 

 the Chcerocampince add a little discordant material to the already 

 heterogeneous mass. I believe the group caj)able of further subdi- 

 vision, but cannot attempt it here from paucity of genera and species 

 in our fauna, belonging to those very groups which here seem aber- 

 rant. 



The genera added from the Macroglossbm' are readily distinguished 

 by having the abdomen tufted at the sides or at tip, and except in 

 ^■EUopos the wings are angulated. I place them at the head of the 

 series here, though in a classification of the species of the world other 

 situations would probably be assigned. 



^Ellopos is readily distinguished by the short, rather slender an- 

 tennae, nearly subequal and furnished with a little hook at tip ; by 

 the broad depressed body, the fon-like tuft at tip of abdomen and 

 the entire margin of wings. 



This genus is a close relative of the European Mncroglossa siella- 

 tannn, and connects that form with the Chcerocampino;. Macroglossa 

 stellatanim, by-the-bye, offers too many points of difference from 

 croatlca to be considered congeneric with it, while on the other hand, 

 despite the opaque wings. I believe cvoatica to be generically identical 

 with the clear winged forms of Hemaris. 



Enyo is not very closely related to the preceding. It is aberrant 

 and easily recognized in our fauna by the prominently crested thorax, 

 the fan-tufted abdomen and small angulated wings. This may form 

 a subfamily type when its tropical relatives are considered. 



Amphion contains a bright little species with long, fusiform an- 

 tenna? recurved at tip, and the wings are angulated. 



Thyreus is a peculiar form, — plump, heavy, somewhat depressed. 

 Head retracted. Abdomen with lateral, truncate tufts to the ab- 

 domen ; primaries angulated. Altogether, a distinguished form. 



Deidamia is still more aberrant, with a decidedly Smerinthid 

 habitus. The head is retracted, crested, the vestiture thin. Abdo- 

 men slender, tufted at tij) ; the primaries angulated. This form in 

 catalogueing should be placed at the foot of the series. Its tenden- 

 cies are all toward the Sinerutthids. 



The remainder of the genera are those usually referred to this 

 subtamily, and they are all untufted, with wings not angulated, and 

 with no striking structural features. 



Deilephila has the antennse thickened toward tip, but not forming 

 a distinct club. The outer side of the first tarsal joint is armed with 

 long spines, a feature not found in any other genus f)f the subfamily. 



