388 [November 



female is lighter colored than the other sex, with two dark brown lines, 

 the outer one continuing straight on to the costa. Beneath in both 

 sexes uniformly darker than above. 



Length of body, S .55, $ .60 ; exp. wings, % 1 inch, 9 1.20 inch. 



It differs from C decipiens in that the S has the two transverse lines 

 curved on the costal region. California, (Mr. Edwards.) 



Subfamily Hepiali Linnaeus. 

 XYLEUTES Hubner. 

 Our species all belong to the above genus, which should be sepa- 

 rated from Cossus. C. ligniperda of Europe is the type of the latter 

 genus. This is a much more robust and heavy form than Xt/kutes, the 

 thorax is more globose, the head is more sunken, the wings are much 

 broader and shorter, having the costa more convex, and the outer mar- 

 gin nearly straight, while the wings are more thickly scaled than in 

 the American genus. 



Xyleutes robiniae Harris. 



fJossus robinice Peck, Mass. Ag. Rep. and Journ. V. p. 67. Plate. (1818). 

 Harris, Cat. Ins. Mass. p. 72. (1835). 

 Walk., Cat. Lep. Br. Mus. VII. p. 1514. (1856). 

 Fitch, Fifth Rt. Nox. Ins. N. York. p. 4. (1859). 

 Morris, Synopsis Lep. N. Amer. p. 124. (1862). 

 Xyleutes robinice Harris, Rt. Ins. Mass. p. 297. (1841). 



Third edit. fig. 205. 203 larva, 204 cocoon. (1862). 

 Mass., (Coll. Harris.) Brunswick, Me., larvae and pupae in the red 

 oak. 



(.') Cossus robinice Boisd., Lep. Cal. Ann. Ent. Soc. France, p. 49. (1852). 

 Walk., Cat. Lep. Br. Mus. VII. p. 1514. (1856). 

 H.-Sch., Lep. Exot. Sp. Nov. Fig. 170, 171. (1856-'58). 

 "California," Boisd. 



Xyleutes crepera Harris. 



Cossm crepera Harris, Cat. Ins. Mass. p. 72. (1835). 



Primaries long and narrow; apex acute, much produced; outer mar- 

 o-in very oblique; inner margin very convex at the base. Primaries 

 mottled much as in X. rohinise. The middle of the wing is darker, the 

 clouded portion uniting and forming an oblique broad continuous band 

 extending from the outer fourth of the inner margin to the apex, and, 

 breaking up above into two broad short bands extending upon the costa. 



Secondaries distinctly triangular, apex acute, basal half of the wing 



