74 NEMATUS MOLLTS. 



Agrees closest with N. scoticus, but is smaller, has 

 the antennae quite black, longer and thinner, the 

 sutures on vertex less deep and the mesonotum much 

 more strongly punctured. From the species with 

 punctured mesonotum it may easily be known by its 

 smaller size, fuscous black stigma, longer and thinner 

 antennas, and shorter and blacker cerci. 



Mickleham, in May (Mr. T. E. Billups). 



17. NEMATUS MOLLIS. 

 PL XVII, fig. 1, Saw. 



Nematus mollis, Htg., Blattw., 201, 30; Thorns., Opus., 621, 

 16; Hym. Scand., i, 98, 22; Andre, 

 Species, i, 131 ; Cat., 14,* 28 ; Br. 

 and Zad.,| Schr. Ges. Konig., xxiv, 

 129, 105. 



Tenthredo lapponica, Zett., Ins. Lapp., 350, 44. 



Antennae a little shorter than the body, rather stout, black, the fourth 

 joint shorter than the third, the rest shorter and thinner. Head 

 narrower than the thorax, black ; the tips of mandibles brownish, palpi 

 dark testaceous ; scarcely shining, covered with close down and faintly 

 punctured, the pentagonal area distinct, fovea between the antennae 

 large. Thorax black, shining, obscurely punctured, the pleurae opaque, 

 densely punctured, pronotum broadly edged with pale testaceous ; the 

 cenchri large, dull white. Abdomen longer than the head and thorax, 

 nearly cylindrical, black, sheath of saw a little projecting; the cerci 

 are longish, pale. Legs obscure whitish-testaceous, the coxae at the 

 base, the base of anterior femora widely, and nearly the whole of the 

 posterior black ; posterior tarsi slightly darkened, spurs long, but 

 not reaching beyond the middle of the basal tarsal joint. Wings 

 hyaline, the costa and stigma pale testaceous, nervures blackish, paler 

 at the base ; the second cubital cellule is nearly double the length of the 

 third, widened and angled considerably where it receives the first 

 recurrent nervure, and having a distinct horny dot at the apex ; the 

 third cellule is narrow at the base, rather wide at the apex ; the first 

 transverse cubital nervure is pale, the tegulaa are pale testaceous. 



The <$ has the antennae thicker and more compressed than in the ? , 

 the posterior femora almost entirely, the anterior largely at the base, 

 and the apex of posterior tibiae, fuscous. 



Length 3 lines. 



Ab. a. Labrum white. 



b. Edge of pronotum black. 



This insect is distinguished by its hyaline wings 

 with testaceous stigma, pale testaceous pronotum, 

 tegulae, and legs, and black femora. 



