1864.] 389 



and costa and subcostal region black, remaining portion yellow. The 

 dark portion is continued down the inner margin and indentates the 

 yellow outer half along and above the median nervure as far as the 

 origin of its three first branches. _ 



Outer margin dark. Beneath, the same as above. 



Length of body, 1.15; exp. wings, 2.20 inches. 



Mass., (Coll. Harr.) 



Xyleutes querciperda. 



Cossu-i querciperda Fitch, Fifth Rt. Jfox. Ins. N. Y. p. 10. (18591 

 Morris, Synopsis Lep. N. Amer. p. 125. (1862). 



% . Gray, being of the same color as Jl. rohinlpe; the surface covered 

 with an irregular net-work of dark lines differing in degrees of fineness, 

 which are not gathered into spots and bands as in X. robinise. It re- 

 sembles in this respect Cossus lujniperda of Europe, which it approaches 

 more than either of the foregoing species in possessing shorter wings 

 and a less oblique outer edge of the fore wings, but the net-work of fine 

 lines are not arranged in transverse narrow lines as in C. liyniperda. 



There is a submarginal row of lines which are a little larger and 

 often connected into bands, throwing out forked branches in each in- 

 terspace towards each edge. 



Secondaries dull and dark, not much paler at the outer edge, conco- 

 lorous with the abdomen. 



Beneath the primaries are but a little more dusky than above; the 

 hind wings are like the anterior pair, covered with a net-work of lines, 

 which are wanting on the upper side, and are paler than above, while 

 the costa is finely peppered with dark scales. Fringe spotted with 

 black. 



Length of body, 1 inch; exp. wings, 2.25 inches. 



This species which I refer with some hesitancy to Dr. Fitch's quer- 

 ciperda, diff"ers from X. robinise in the fuller more convex costa of the 

 fore wings ; the apex is not so much produced, the outer edge much 

 shorter and not so oblique, thus making the inner edge much longer. 

 It is also smaller. 



Newburgh, New York, (Mr. Edwards.) 



Xyleutes populi. 



Cossus populi Walk., Cat. Lep. Br. Mus. VII. p. 1515. (1856). 

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

 St. Martin's Falls, Albany River, Hudson's Bay, Barnston, (Walker.) 



