NEMATUS GLENELGENSIS. 93 



head is of a paler green than the body and bears a few 

 fuscous dots ; the mouth is brown. The legs are, glassy 

 green with brown claws. When full fed it becomes of 

 a uniform green colour. The pupa is pale green. 



It feeds in June on Salix alba and on Salix fragilis, 

 and the deep brown longish cocoon is spun under holes 

 in the bark. 



Brischke (1. c.) states that the larvae feed also on 

 the aspen, and that they gnaw long passages in the 

 willow bark and hollow branches, out of which they 

 seldom creep forth, and in which the cocoon is spun. 



Histrio is widely distributed, but does not appear to 

 be common. I have seen specimens from Clydesdale, 

 Berwickshire, and Worcester. 



It is met with in Lapland, Scandinavia, Germany, 

 Russia (Curland), Holland, Switzerland, and France. 



32. NEMATUS GLENELGENSIS. 

 PL XVIII, fig. 5, Saw. 



Nematus glenelgensis, Cam., Trans. Ent. Soc., 1882, 535. 



Dark brownish-red, the antennae, the space surrounding the ocelli, 

 breast, a mark on middle lobe of mesonotum, the greater part of the 

 lateral lobes, apex of scute! lum, metanotum, base of abdomen, and a broad 

 transverse mark on the four apical segments, cerci and sheath deep 

 black. Labrum and clypeus dirty white. Legs pallid testaceous; 

 cox83 at base, the basal fourth of anterior femora, basal half of middle, 

 and the whole of posterior pair lined above and beneath with black ; 

 all the tarsi, apex of anterior tibia3, apical half of middle, and the whole 

 of posterior pair, black. Wings hyaline, with a very slight griseous 

 tinge ; costa and stigma fusco-testaceous, the latter much clearer in 

 the middle. 



Length 3i lines. 



I believe this is a distinct species from N. histrio, 

 although it must be confessed that the two are 

 very closely allied. It is smaller by a line than the 

 ordinary form of histrio, the ground colour is very 

 much darker, the legs especially being almost entirely 

 black ; the antennae are longer and thinner, and taper 

 more towards the apex, and the saw differs, its apical 



