Catalogue of North American Sphinges. 317 



I received this species from Dr. A. G. (Emler, of Savannah, 

 Georgia, and have adopted the specific name that he gave to it, 

 and from which it is to be presumed that the larva Uves upon the 

 Ipomaca. The Melanlhus and Nycieus of Cramer resemble it 

 somewhat, and are probably congenerical with it. 



Subgenus Cosmosoma. IlUbner. 

 Antennae long, very much attenuated at the end, and with a double row of very 

 short pectinations beneatli. Tongue moderate, spirally rolled. Palpi long, curved 

 upwards, and extending beyond the clypeus; the joints cylindrical, covered with 

 gmall scales, a little hairy at base, and obtuse at tip. Wings elongated, hind pair 

 rather small, and with the discoidal cell and ncrvures as in Sijnlomdda. Body 

 cylindrical, rounded and not tufted behind, and with a small tubercle on each side 

 of the first abdominal segment. Spurs of the hindmost tibia; four and of moderate 

 size. 



2. G. (C.) Omphale. Hiibner (according to Say). = ^ge- 

 ria Omphale. Say. 



Scarlet ; wings transparent, veined and bordered with black, 

 the first pair with a small black subcostal spot, and the black bor- 

 der very much widened at tip; head azure-blue ; antennas black, 

 with the tips white ; two terminal joints of the palpi, and a line 

 on each shoulder-cover black ; four azure-blue dots in a transverse 

 row on the fore-part of the thorax ; last four segments of the ab- 

 domen black, with four azure-blue spots on each side, and a dor- 

 sal black line extending from the middle of the second segment 

 including in it seven azure-blue spots ; belly and outside of the 

 second pair of tibiaj black. Expands one inch and a half or more. 

 Inhabits Florida. 



For a specimen of this beautiful insect I am indebted to Mr. 

 Doubleday. It cannot belong to the genus jEgeria, to which it 

 was referred by Mr. Say, in his American Entomology, where it 

 is figured. As Hilbner's works are not accessible to me, I have 

 drawn up the characters of the subgenus Cosmosoma from the 

 specimen of the Omphale in my possession. Zygrrna Androm- 

 acha of Fabricius and the Caunus of Cramer probably belong to 

 the same subgenus. 



Subgenus Lycomorpha. H. 



Antenna; rather short, curved, toothed or with very short pectinations on each 

 side, which give to the joints, when seen from beneath, a cordate or bilobed appear- 

 ance. Tongue about half as long as the body, spirally rolled. Palpi short, hardly 

 extending beyond the clypeus, nearly horizontal and but slightly curved at base, 

 and covered with largo and rather loose scales. Wings not elongated, rounded at 

 tip; discoidal cell of the hind pair long, extending nearly to the hiud-raargin, and 



