288 Catalogue of North American Sphinges. 



ceptat the base, which is hairy, and pointed at the tip. Wings more or less trans- 

 parent. Abdomen with a caudal tuft. Flight diurnal. Larvae whitish, soft, 

 slightly downy, living within the stems of plants, and generally transforming in a 

 cocoon made of fragments of wood and bark cemented by a gummy matter. Pup^ 

 with the edges of the abdominal segments armed with transverse rows of small 

 teeth. 



The American species in this family may be disposed in the genera Trochilium, 

 ./Egeria, and Thyris. 



Genus X. — Trochilium. 



Wings narrow, entire, all of them, or the hind-pair at least, transparent. An- 

 tennse short, stout, arcuated, gradually thickened nearly to the end, which is curved 

 but not hooked ; underside generally fringed wiih a double row of very short bris- 

 tles in the males. Tongue very short. Body thick; abdomen slightly tufted at 

 the end. 



Genus XI. — iEgeria. 



Wings narrow, entire, all of them, or the hind-pair at least, transparent. An- 

 tennae mostly elongated, sometimes short, arcuated, gradually thickened nearly to 

 the end, which is curved but not hooked ; underside generally fringed with a dou- 

 ble row of short bristles in the males. Tongue long. Body slender; abdomen 

 nearly or quite cylindrical, ending with a flat or trilobed tuft. 



Genus XII.— Thyris. 



Wings broad, subtriangular, more or less angulated and indented, opaque, with 

 small semitransparent spots. Antennae fusiform, but slender and only slightly 

 thickened in the middle, arcuated, and simple in both sexes. Tongue moderate. 

 Body short and thick ; abdomen conical, and tufted at the end. 



Tribe II. — Sphinges adscitse. 



The species described in this catalogue may be disposed in three families, Aga- 

 ristiadce, Zygaeniadse, and Glaucopididae. 



Family IV. — Agaristiadee. 



Antennae straight, slightly thickened in or beyond the middle, and curved at the 

 tip. Palpi elongated, slender, not pressed to the face, hairy at base, with the ter- 

 minal joint cylindrical, scaly or almost naked. Wings broad, subtriangular. Tail 

 hairy or tufted. Flight diurnal. Larvae elongated, cylindrical, or enlarged a little 

 behind, slightly hairy, transversely banded or spotted, and without a caudal horn. 



Genus XIII. — Alypia. 



Wings broad, subtriangular, entire, and opaque, with large whitish spots. An- 

 tennae somewhat elongated and slender, thickened very gradually from beyond the 

 middle nearly to ihe tip, which is slightly curved, obtuse, and not tufted. Palpi 

 long, porrect, separate, with the first two joints very hairy, and the third joint cy- 

 lindrical, scaly, and obtuse. Tongue moderate, and spirally rolled. Abdomen 

 somewhat elongated, nearly cylindrical, fringed at the sides and tip with short 

 hairs. Anterior and intermediate tibiae thickly clothed with hairs. Posterior tibiae 

 with two pairs of pretty long unequal spurs. 



