2 LEPIDOPTERA. 



1. P. populi, L. — Expanse \\ to If incli. Blackish- 

 brown, with a whitish collar, and a whitish line across the 

 middle of all the wings. 



Antenna of the male strongly pectinated, the rows of 

 teeth rather inclining together, smoky-black, shaft light 

 brown ; head densely tufted with blackish scales which are 

 tipped with light brown ; collar conspicuously covered with 

 long whitish scales which are tinged at the base with reddish ; 

 thorax stout, densely covered with long black scales, those 

 upon the shoulder-flaps tinged with reddish ; abdomen less 

 stout, covered with long loose blackish scales, except at the 

 base, which is reddish ; anal tuft rather long and loose. 

 Fore wings long and almost bluntly triangular; base very 

 narrow ; costa but slightly rounded ; apex bluntly angulated ; 

 hind margin long and very oblique, gently rounded ; dorsal 

 margin short and rather straight; smoky-black, rather thinly 

 covered with scales, and somewhat diaphanous, tinged with 

 reddish-brown at the base and along the dorsal margin ; first 

 line placed near the base, curved, slender, yellowish or 

 reddish; second line also slender, yellowish-white, oblique, 

 indented, and having several slight curves, and one, more 

 decided bend, back to the costa ; cilia reddish-brown with 

 yellowish dashes, but more densely scaled than the rest of 

 the wings and forming an opaque edge. Hind wings 

 rounded, not very broad ; semi-transparent purplish-grey 

 with a broad indistinct yellowish-white transverse stripe, 

 expanding into a blotch at the anterior margin, edged inside 

 with darker grey ; hind margin with a dark grey line ; cilia 

 reddish-brown dashed with yellowish, and forming a very 

 pretty edging. 



Female stouter, with antenna shortly but regularly pec- 

 tinated ; collar reddish ; abdomen stout, reddish ; fore wings 

 decidedly longer and larger, with the pale second line broader 

 and more conspicuous ; otherwise similar. Underside of the 

 wings in the male blackish, faintly tinged with reddish- 



