195 



apex ; the outer edge very oblique and long, not bent, fully as long as the 

 inner edge. ■ Hind wings very long and narrow, regularly oval in outline, the 

 costal edge long and straight, apex rounded; the inner edge merged with 

 the outer, more so than in Carsia. Venation: two short subcostal cells, the 

 first three subcostal venules subequal, the origin of second and third adjacent; 

 the median venules very short. Fore legs with the tibiae short and very 

 thick, armed with a large projecting spine in both sexes; hind legs long and 

 slender, tarsi much longer than the tibiae. Male abdomen large, thick, long, 

 extending to an unusual distance beyond the hind wings. Coloration : pale 

 whitish-gray, with three rows of black spots on the fore wings. 



This genus, remarkable' for the spines on the fore legs, somewhat resem- 

 bles Carsia in the long fore wings and oval hinder pair, but differs in the 

 venation. The head is unusually full in front, and the palpi are large, while 

 the antennae are not ciliated. 



Synopsis of the Species. 



Largo, hind wings oval L. triscriata. 



Smaller, hind wings rounded ...L. rotundata. 



Lithostege triseeiata Packard. Plate 9, fig. 30. 



Lithostegc triseriata Pack., Sixth Rep. Peab. Acad. Sci., 39, 1874. 



1 <? and 1 9 . — Form of the body and wings much as in L. farinata 

 Hufn. of Europe. The wings are a little more rounded at the apex, espe- 

 cially in the female; the form of the head is the same; the palpi, however, 

 are a little longer, and the two unequal spines on the fore tibiae a little shorter 

 than in the European L. farinata. Body and wings whitish-cinereous, part 

 of head and palpi dark brown. Fore wings whitish-ash, with three series of 

 conspicuous black, mostly venular, spots ; the inner row within the basal 

 third of the wing; one obscure costal spot, another situated on the median 

 vein, a longitudinal black spot in the interspace below and another on the. 

 internal vein. Beyond the middle of the wing, an oblique line of about eight 

 longitudinal black venular spots, and just beyond a row of about eight black 

 venular dots. A submarginal, slightly sinuous, broad, white line, with an 

 apical scallop. Fringe whitish, with a blackish marginal line. Abdomen 

 and hind wings uniformly smoky-ash. with no markings. Beneath, both 

 wings smoky-ash ; around the edges, especially of the fore wings, finely 

 dusted with white. Two or three subapical costal faint spots. Fringe white, 

 with a subbasal dark line, and faintly checkered. 



