CAMPONISCUS LURIDIVENTRIS. 23 



The larva was described by Degeer and Reaumur 

 under the name of the " larve cloporte." It feeds 

 on the underside of alder leaves, eating irregularly- 

 shaped holes between the principal veins, and gener- 

 rally is found resting motionless, the body being 

 pressed close to the leaf, with which it agrees closely 

 in colour. 



It is somewhat onisciform in shape, extremely flat, 

 the back rounded, with the sides expanded, almost 

 transparent and membranous. The head rises sharply 

 from the back, is sharply depressed on the top, and the 

 face generally slopes in the direction of the mouth, 

 especially when the head is partly withdrawn within 

 the overhanging folds of the second segment. It is 

 green, with a tinge of yellow, and bears two light 

 brown marks on the top, the mouth being of the same 

 colour but deeper in hue, and the eye-spots are black. 

 The legs are green, and are hid by the overhanging 

 folds of the body. The body in the centre is of a 

 beautiful dark shining green, with the sides paler, the 

 segments being waved and fringed with long white 

 hairs. On the third and following segments, except 

 the last, are, at the juncture of the segmental divisions, 

 two black, irregular marks placed above the flat sides, 

 the one nearest the top being the largest. Another 

 dot is placed between the second and third segments. 



Length 5 6 lines by 1^ 2 lines broad. 



The larvae are found between July and October ; 

 they pupate in the earth, spinning a dark cocoon of 

 the usual shape. The pupa is green and appears in 

 May. Parasites are Mesoleius transfuga, Him., and 

 M. leptog aster, Hlrn. 



The species in this country is coextensive in its dis- 

 tribution with the food plant, while its range in Europe 

 extends from France northward. 



