DELTOIDES. 281 



lateral tufts minute, anal compressed. Fore wings short, 

 rounded, almost ovate ; costa gently arched ; apex bluntly- 

 rounded ; hind margin smoothly curved, hardly oblique ; 

 dorsal margin a little filled out ; colour smoky brown-black ; 

 first line slender and obscure, curved, indented, yellowish- 

 white ; second line of the same colour, slender, zigzagged 

 throughout, and broadened at the dorsal margin ; subterminal 

 line a similar series of short angulated streaks more or less 

 joined together, and followed close to the hind margin by 

 another such series ; middle area between the first and 

 second lines clouded with black ; beyond this the costa is 

 dotted with yellowish-white ; extreme hind margin edged 

 with an undulating black line ; cilia smoky-black, regularly 

 dashed with yellowish-white. Hind wings rather short, 

 rounded behind, very similar to the other pair ; black-brown, 

 clouded in the middle with black, and beyond abundantly 

 dusted with yellowish-white dots and atoms placed roughly into 

 three series, the first broadened into a pale yellow blotch at the 

 dorsal margin, the third lying in dots along the hind margin, 

 which is edged by an undulating black line ; central spot black ; 

 cilia crenulated, smoky-black with whitish dashes. Female 

 similar, but with simple antennas and the body a little stouter. 



Underside of all the wings dull smoky-brown ; costa of 

 the fore wings and all the cilia dotted or dashed with pale 

 yellow ; a faint yellow transverse stripe just beyond the 

 middle is continuous on all the wings, outside it is a faint 

 slender indented similar shade, most visible on the hind. 

 Body and legs smoky-black, tibia; barred with yellow. 



This species bears a singular general resemblance to a 

 shape usual among the Geometridce, and has in consequence, 

 until recently, been placed among them. The structure of 

 its palpi, however, seems conclusive as to its proper position. 



On the wing in June and July. 



Larva with twelve feet. Moderately stout, cylindrical, 

 attenuating slightly at both ends. Ground colour sooty- 



