176 BLACK AND WHITE HORNED CLEAR-WING. 



basal segment. The wings are transparent ; the 

 upper pair with the nervures, the margin, the apex, 

 and a broad transverse stripe not far from it, blue- 

 black ; the posterior pair having the hinder edge, 

 the nervures, and a cross mark near the middle of 

 the anterior edge, likewise blue-black. The fringe 

 of the wings is brownish-ash. The thighs and 

 tibiae are blue-black, the former yellow externally 

 in the fore-pair; the tarsi yellow, sprinkled with 

 black ; antennae yellowish- white at the apex. 



Still rarer than the preceding, both in this country 

 and on the continent. The few British examples 

 preserved in cabinets have been found chiefly in the 

 neighbourhood of London and in the Isle of Wight. 

 It frequents birch-trees, on the wood of which the 

 larvae probably feed. 



