species of Nematus from Britain. 535 



sharper at apex ; recurrent nervures in hind wings 

 received closer to each other ; clypeus almost transverse, 

 &c. It has a superficial resemblance to ribesii ; but that 

 species is readily separated from it by the pale antennae. 

 The black marks on lateral lobes of mesonotum are 

 sometimes united to scutellum, which may be entirely 

 black, or its apex may be luteous ; and the metanotum 

 may also be black, or only the space surrounding the 

 cenchri. The amount of black colour on the breast and 

 sides also varies. 



Bare ; on birch in June. Craig Dhu, Kingussie ; 

 Claddich, Loch Awe. 



Nematus glenelgensis, n. s. 



Dark brownish-red ; the antennae, the space surround- 

 ing the ocelli, breast, a mark on middle lobe of meso- 

 notum, the greater part of the lateral lobes, apex of 

 scutellum, metanotum, base of abdomen, a broad trans- 

 verse mark on the four aj)ical segments, cerci and sheath 

 of saw, deep black. Labrum and clypeus dirty white. 

 Legs pallid testaceous ; coxae at base, the basal fourth of 

 anterior femora, basal half of middle and the whole of 

 the posterior pair, lined above and beneath with black ; 

 all the tarsi, apex of anterior tibiae, apical half of 

 middle and the whole of posterior pair, black. Wings 

 hyaline, with a very slight griseous tinge. Costa and 

 stigma fuscous-testaceous, the latter griseous in the 

 middle. Length, 3^ lines. 



I sent a specimen of the above-described species to the 

 late Prof. Zaddach, who returned it as probably a variety 

 of histrio, but I believe myself it is a distinct species. 

 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, 

 thinner, and taper more towards the apex, and the saw 

 differs, its apical division being bent in the middle, while 

 with histrio it is straight. 



I bred it from larvae which I got feeding on Salix 

 aurita at Glenelg, Inverness-shire, and these larvae appear 

 to agree very closely with those of histrio, but were 

 smaller and more slender. The head was light green ; 

 mouth dark brown. Legs light green ; claws brown. 

 Body dark green ; the segmental divisions are marked 

 with white lines. Down the back runs a dark green 



TRANS. ENT. SOC. 1882. — PART IV. (DEC.) 4 A 



