AUGUST. 



263 



set together as to make yellow spots, visible a long way off. 

 These little flocks continued at intervals for some miles. 



F. A very large species of Hemerobius, the Canadian 

 Pearl-fly (Chauliodes Pectinicornis),* was given me yester- 

 day : it measures three inches and a half in spread of wing : 

 the jaws are curved and sharp ; the antennae strongly pecti- 

 nate ; the wings tinged with pale brown, the nervures spot- 

 ted with black ; they are netted, but the cross nervures are 

 few. I caught a pretty Sphinx, busily hovering over some 



CANADIAN PEARL- FLY. 



(Chauliodes Pectinicornis.} 



tubular flowers in a friend's garden, during the heat of the 

 day ; the Humble-bee Hawk-moth (Sesia Pelasgus) ; the 

 wings are reddish brown, with hyaline disks. It is rare, as 

 I have never met with it before. 



C. Two or three specimens of a curious Musca ( Ta- 



china ?) have occurred lately : the abdomen is large 



and round, of a scarlet colour, covered with strong upright 

 spines or bristles. I have also taken the Sheep Gad-fly 



* This fine insect, I should state, the only living specimen I ever saw, 

 was not taken in the neighbourhood of Compton, but at Quebec, on the 

 30th of July, 1835. 



