NATURAL HISTORY SOCIETY OF GLASGOW. 21 



24, 7, pi. 38, f. 1. C. eucera, Hart., Blattw., 177, 4. C. viminalis, 

 V. Voll., Tidjr., i., p. 176, pi. 10; Zool., 7721; Boiich6, Natur. 

 Ins., 100; Ratz., Forst., iii., p. 129, Taf., 9; Brischke, Beschr., 

 9, pi. ii., f. 1 ; Thorns., Hym. Scand., i., 74, 5. 



Luteous ; head, middle of the breast, pronotum in front above, 

 meso- and meta-notum for the greater part shining black. 

 Antennae longish, black above, beneath deep ochreous. Apice 

 of tarsi fnscous-black. Palpi and tegulae pale luteous. Wings 

 j'-ellowish-hyaline, slightly clearer at the apex ; nervures and 

 costa dark reddish-brown ; stigma at base dark fuscous. The 

 1st sub-marginal nervure is sometimes present, as often absent. 

 Length 3 to 3^ lines. 



The male has longer antennae, of a dark luteous colour, except 

 the two basal joints, which are black. 



The luteous colour of this insect serves at once to distinguish 

 it from the other species. 



The larva has the head compressed in front, shining black ; 

 mouth pale yellow ; mandibles black. Feet white ; claws brown, 

 with a black line over them ; claspers white. The 2d, 3d, and 

 the two last body segments, orange, the rest of the body green, 

 sometimes with a faint orange tinge. On each side, close to the 

 top, are twelve large oval or roundish black marks; directly 

 over each clasper is a small black mark ; over these, and close to 

 the large dots, are two small ones, also black ; over the anal 

 segment is a large oval black mark. When full-fed, the body is 

 entirely orange, with the exception of the legs and the above- 

 mentioned black marks. The body is cylindrical, rather flat, 

 broader anteriorly than posteriorly ; the skin beset with tubercles, 

 from each of which proceeds a longish hair ; the segments are 

 well marked. Length nearly 12 lines. 



The eggs, according to van Vollenhoven, are deposited in the 

 leaf-stalk of the poplar, the petiole thereby being swollen on both 

 sides, bending over, and to a certain extent, covering the eggs. 

 In one case ten eggs were laid on one, and eight on the other side 

 of the stalk. When young the larvae are green, with black heads, 

 and it is not till the second moult that the orange colour begins 

 to show itself. 



They feed in company, on the underside of the leaves of the 

 poplar, in a row of three to five on a leaf, each larva touching its 

 neighbour. They eat only the epidermis, according to my 



