TRIFJD.-E. -05 



rounded, black, or often yellowish-brown, with a black-brown 

 spot on each lobe when full grown ; body rather translucent, 

 pale green, o-reenish-white, or pale yellow-green, whiter on 

 the back; dorsal line distinct, white; subdorsal lines also 

 white, much more slender; spiracular stripe either absent 

 or restricted to two slender waved whitish threads enclosing 

 the spiracles, which are more or less obscurely edged with 

 black ; segmental divisions tinged with yellow ; legs and 

 prolegs of tlie body colour. Very similar to the larva of 

 Cnmatoj)liora or, but not so much flattened and having a 

 darker head; also, when young, closely resembling that of 

 Tethea suhtusa, for which it may readily be mistaken, all 

 three feeding in a similar manner and on the same food- 

 plants. 



April to June on aspen and poplar (Fojmlus ircmida, 

 P. nigra, &c.), always lying curved during the day between 

 two leaves the edges of which are fastened to each other 

 with silk so as to form a flat habitation, but leaving this 

 shelter promptly so soon as dusk approaches, to feed upon 

 the surrounding leaves. To all appearance it returns in 

 the morning to the same habitation. Mr. Fenn has found 

 it to feed also on sallow. 



Pupa reported to be very similar to that of T. gothica ; 

 apparently not described. In a cocoon in the earth, often 

 at the foot of a poplar tree, and, like its congeners, usually 

 containing the living moth throughout the winter. 



The moth has habits similar to those of its allies, but 

 I know of no record of its having been seen to fly in the 

 daytime. It doubtless hides at that time among dead leaves. 

 At dusk it frequents sallow-bloom, and has been taken, 

 though rarely, at sugar; but it is by no means the familiar 

 and almost ubiquitous frequenter of the catkins as are 

 some of its allies, being exceedingly local, and in most of 

 its localities rather uncertain and irregular, occurring in 

 plenty in certain seasons, in others being rare. This is 



