58 HYLOTOMA USTULATA. 



From the antennae varying in colour (it being some- 

 times testaceous) I suspect that H. metallica may also 

 be referred to ustulata. Konow (1. c.) separates it from 

 ustulata through the antennas being reddish-yellow (in 

 ustulata black), the body bronzy (in ustulata greenish 

 blue-black) ; the wings yellow, with brown under the 

 stigma (in ustulata yellow, with brown spot under the 

 stigma). 



I suspect that H. corusca, Zad. (which seems to differ 

 only in having the hinder tibiae white at the base and 

 the rest of the legs black) and H. expansa, Klug (which 

 agrees in coloration with Ab. d, save only that it has 

 the fasciae below the stigma well developed) are only 

 varieties of ustulata. The dark-legged specimens are 

 all from the Highlands. I have never seen English 

 specimens. 



The larva has a rather small head, very light brown 

 in colour, darker on the top, and there is a dark brown 

 band going down the face from the back. Mouth deep 

 brown, eyes black, and there is a light brown line going 

 into them from the top. Body dark green, shining, 

 back darker, and the dorsal vessel is bordered on 

 either side by a white line; there is also a pale line 

 going along the sides. The skin is beset with little 

 black tubercles, each ending in a bristle-like hair ; on 

 the back these are arranged in pairs; on the sides 

 there are two pairs, and a single one below the lower 

 second pair, but this arrangement varies. Those on 

 the thorax are somewhat larger than the others. The 

 legs are whitish, spiracles brown. The body is flat on 

 the ventral surface, over which the sides project so 

 as almost to hide the legs ; above, the body is convex, 

 and it tapers towards the tail. 



It feeds on willows and birches in the autumn, and 

 spins a cocoon in the ground, or among dead leaves, &c. 



Common and universally distributed in Britain. 



Continental distribution : General. 



