2*78 LEPIDOPTERA OF NORTH AMERICA. 



2. E. dryas Cram. Phalaena dryas Cram. Pap. Exot. I, 110, pi. 70, f. C. 



Black. Abdomen luteous, with dots on the sides and the tip, 

 black. Fore wings dark brown. Hind wings blue, broadly mar- 

 gined with brown. 



West Indies. 



Walker. 



Group ? 



1. E. bimaculata Fair. Mant. Ins. II, 106, 51 ; Ent. Syst. Ill, 1, 402, 54. 



Sphinx zygaena bimaculata Gmel. ed. Syst. Nat. I, 5, 2398, 145. 



Wings concolorous black. Fore wings with two yellow spots. 



Hind wings with two white spots. 



America, North ? 



Walker. 



2. E. achemon Fair. Sp. Ins. II, 162, 24 ; Mant. Ins. II, 104, 29 ; Ent. 



Syst. Ill, 395, 31. Sphinx zygaena achemon, Gmel. ed. Syst. Nat. I, 

 5, 2396, 131. 



Wings brown, with two white spots. Abdomen blue, banded 

 with yellow. 



Jamaica. 



Walker. 



3. E. dares Cram. Sphinx adscita dares Pap. Exot. I, 76, pi.- 48, f. P. 



Blackish-brown. Fore wings white, with a large brown spot 



on the disk, and a smaller one of the same hue on the margin. 



West Indies. 



Walker. 



Group Mastigocera. 



Mastigocera Harris. N. A. Sphinges, 35, note. 



Dr. Harris' description of the characters of this group is so 

 indefinite that it is scarcely possible to determine its relationships. 

 I think, however, it belongs to the genus Euchromia and to the 

 group Horamia. 



1. M. vespina Harris. Cat. N. A. Sphinges, 35. 



Light rust-brown. Wings immaculate. Collar, first abdominal 

 segments above, third^below, and a triangular spot on each side, 

 white. Head, thickened part of the antennae, edge of the thorax 

 behind the collar, and a large triangular spot on each side of the 



