122 NEMATUS VIRIDESCENS. 



The $ has the antennae long, pilose, rufescent, except at base ; the 

 black mark on vertex extends to the base of antennae, where it is 

 narrower than it is behind ; breast black ; the pleurae and abdomen at 

 sides and apex rufescent ; costa and stigma fuscous ; hinder tarsi and 

 apex of tibiae blackish. 



Length 3 3J lines. 



The larva has the head pale brownish-green, the 

 mouth darker, a black line enters the eye spots from 

 above. Body green, a broad white pulsating band on 

 back, and a thin thread-like white line goes through 

 the spiracles. The skin is smooth, scarcely in folds, 

 or marked with black. Cerci reddish. Legs yellowish- 

 green, with brown claws. It feeds on Salix alba, S. 

 fragilis, and 8. pentandra. 



Probably common. Clydesdale, Worcester. 



Continental distribution : Sweden. 



51. NEMATUS VIUIDESCENS. 

 PL XXI, fig. 2, Saw. 



Nematus virescens, Thorns., Hym. Sc , i, 153, 85 ; Br., Schr. Ges. 



Konig., xxiv, 161, 144, non Hartig. 

 croceus, var. g. Thorns., Opus., 637. 



Pale green; antennae, vertex largely, metanotum (sometimes the 

 extreme apex of scutellum), and the back of abdomen broadly, black. 

 Antennae not much longer than the abdomen, the third joint consider- 

 ably shorter than the fourth, and not much longer than the long 

 diameter of the eye; frontal area clearly denned, longer than broad, 

 the apical edges angled. Cerci short, spurs not reaching to the middle 

 of metatarsus ; apex of posterior tibiae and the tarsi more or less black. 



Length 2^ lines. 



From N.palliatus this species may be known by the 

 green tint of the body and stigma, by the antennae 

 being quite black, or at least but very slightly brownish 

 at the tips underneath, by the smaller cenchri, shorter 

 cerci, and the antennae also are apparently shorter in 

 proportion. From N. curtispina the longer spurs at 

 once separate it, as do likewise the shorter and darker 

 antennae. The broad continuous black band on the 

 back of the abdomen, and the greater extension of 

 black on the vertex and thorax, distinguish it from 



