AMERICAN LEPIDOPTERA. 187 



miQiickiug tlie European geuus Gnophi'ia. Their metallic colors aid 

 our conception of their true position.* 



Family BOMBYCIDAE. 

 Subfamily LiTHOSlINAE. 

 CISTHENE. Walk. 

 Cisthene unifascia, n. s. (Plate 2, fig. 61 9 •) 



% 9 . — Head, protliorax and tegulae, above, pale ochre yellow. 

 Beneath, the legs are pale yellow; anterior and middle tibiae maculate 

 with lead color. Primaries rather narrower than in C. siibjecta, 

 apices appearing more rounded, hind margin more oblique. A median 

 pale ochre yellow band running from costa to internal margin, and 

 continued to the base of the wing. This band varies in width, ap- 

 pears to be narrower in the male, and is slightly constricted on the 

 disc. It seems to be the result of the fusion of the spots on costal and 

 internal margins at this place in C. subjecta. Beneath, as above, the 

 band showing a warmer tinge. Hind wings and abdomen rose color, 

 former touched at apices with a leaden hue. 



Exjxtnse, 14 — 16 mil. Length of hotly, 5 — 6 mil. 



Habitat. — Florida and Texas. 



Notwithstanding the variability of our Northern C. subjecta, the 

 present may be a distinct species. It merits a name in any event from 

 the constancy of its ornamentation. 



Subfamily CocilLlDlINAE. 



MONOLEUCA, n. g. 



Allied to Euclea. Iliihn.f Primaries broad and short, three-quarters 



as broad as long. The costa is eonvexedly rounded, rising from the 



base of the wing. In Euclea the wing is more elongated, narrower, 



and the costa is depressed basally, rounding to the apex. Antennae 



* In studying the Family characters of a lepidopterous genus, attention 

 should be directed to the characters offered by the body parts in contradistinc- 

 tion to those exhibited by the "limbs" and "wings," these latter a true ex- 

 tension of the body crust and not homologous with the wings of Birds. The 

 relation between the wings of Vertebrates with the so-called " wings" of Arti- 

 culates is merely, and that in part, functional. On these points the attention 

 of the student is hereby earnestly drawn to a work now being published by Dr. 

 A. S. Packard, Jr.. of Salem, Mass., entitled; A Guide to the Study of Insects. 

 In this work the organization of Articulates is elaborately discussed and illus- 

 trated, and its conscientious perusal cannot fail to benefit tire student by im- 

 parting just and conservative views on its interesting subject. 



I Packard, Synopsis United States Bombycidae, Proc. Ent. Soc. Phil., p. 336, 

 ISGi. 



