106 GEO. D. HULST. 



with some species of tlie Epipuscliiidai. Rarely tlie lueniber imme- 

 diately above the base is notched, though generally short cylindrical. 

 In length the antennae have very little variation, the length being 

 somewhat more than half the length of the fore wing. The num- 

 ber of segments varies in those I have observed from 48 to nearly 

 70, the larger number of species having 54 or 55. 



Thorax and Appendacies. — The thorax is generally slight, 

 though in a few instances heavy and noctuiform. It is, so far as I 

 know, never tufted above, though in rare instances in the male sex 

 it has a brush of hairs in front on either side below. There is also 

 in many species a tuft on either side, lying concealed between the 

 second and third segments of the thorax behind the coxae of the 

 middle legs. The patagise are rather loosely scaled, not closely ap- 

 pressed, and with vestiture reach to the extremity of the thorax. 

 The vestiture of the thorax is scaly, generally close and appressed, 

 and rarely with any tendency to be mixed with hairs. 



Wings. — The fore loing^ vary considerably in shape. They are 

 generally narrow, elongate and subparallel, but sometimes are rather 

 broad and somewhat triangular or oval. There is much variation 

 in the arching of the costa, the sharpness of the outer angles, and 

 the direction of the inner margin. There is considerable difference 

 of wing shape in the sexes. In the females the fore wings are often 

 broader with more rounded angles and outer margin. The fore wings 

 are almost always with two cross lines, varying somewhat in position 

 and dividing the wing into three fields, a basal, middle, and outer. 

 There are almost always one or two black spots at or near the end 

 of the discal cell. Sometimes there is a cross ridge of raised scales 

 near the basal line. There is rai-ely in the males a tufling of scales 

 beneath the wing, along costa, near the base. More rarely this be- 

 comes a fold, and may conceal a brush of hairs. The wnngs at rest 

 ai-e folded about the abdomen, concealing the hind wings. 



The hind ivlngs are subtriangular, the anterior angle being gener- 

 ally quite distinct, the anal rounded or obsolete. There is sometimes 

 a slight tendency to falcation below the anterior angle on outer mar- 

 gin. They generally vary little in coloring, the variation being only 

 from dark fuscous to translucent or satiny white. There is rarely in 

 the males a tuft or two of hairs near the base above. The pectina- 

 tion of the lower median, near base above, is sometimes nearly obso- 

 lete. The fringes are sometimes quite long and Tineid-like in appear- 

 ance. 



