540 Species of Nematus from Britain. 



Nematus Thomsoni, n. s. 



Nernatus hyperboreus, Cameron, Fauna of Scot., Hym., 

 i., 32, 7ion Thomson. 



Black; labrum, anal segments, tegulae, edge of pro- 

 notum, legs, costa and stigma, white ; anterior femora 

 largely, posterior nearly all, black. Antennas a little 

 longer than half the length of the body, setaceous, de- 

 creasing in thickness towards the apex ; the 3rd and 4th 

 joints equal, the rest shorter. Head a little narrower 

 than the thorax, slightly rounded inwardly behind, black, 

 shining, covered with a longish pubescence ; labrum dull 

 white ; palpi dark fuscous ; front and vertex slightly 

 rugose ; sutures and fovese not deep ; pentagonal area 

 obsolete. Thorax shining, smooth, covered with a longish 

 scattered greyish pubescence ; the posterior edge of the 

 pronotum and tegulse are white ; cenchri large, white. 

 Abdomen oblong, broad, truncated at the apex, black, 

 smooth, shining, very minutely punctured ; anal segment 

 sordid white ; cerci long, white, the apices pointing to- 

 wards each other; saw black, hairy, shortly exserted. 

 Legs dirty white ; the coxae at the base, about a third of 

 the anterior femora, posterior almost entirely, anterior 

 tarsi at apex, the posterior entirely, and the apex of the 

 hinder tibiae, black ; the spurs are short. Wings hyaline ; 

 costa and stigma white ; nervures blackish ; the 3rd 

 cubital cellule is double the width of the base at the 

 apex. Length, 8f lines. 



Differs from N. hyperboreus, Thorns. = clibrichellus , 

 Cam., male, in the thorax being less strongly punctured, 

 in the tegulae and edge of pronotum being white, in 

 being somewhat smaller and broader compared to the 

 length, in the posterior tarsi not being black, &c. 



I have ventured to name this species after the dis- 

 tinguished Swedish Entomologist, whose works have been 

 of such signal service to British Entomologists. 



Taken at Braemar by Dr. Sharp. 



