1875.] 129 



TenthreJo sal ids, Dc Gccr, Mein. ii, 259, li, tab. 37, figs. 12—21 ; 

 Nemntiis melanocepJialHs, Ilartig, Blatt- u. nolz-wespcn, 219, 52 ; N. 

 perspiciUaris, Brisclake, Bcschr. etc. dcr Blattwespen Larveii, 7, pi. 1, 

 fig. 3 ; ^'i salicis, Thomson, Hymen. Scand., i, 141, 70. 



The species was not known to Hartig, who merely abstracted Do 

 Geer's description, and applied the name of melanocephalus to it, ho 

 rightly remarking that it is not the TentlireJo salicis, Lin. Bnt Thom- 

 son has judged otherwise, and ho has renamed the Nematus salicis, 

 Hartig (which that author considered to be identical with T. salicis, 

 Lin., and in my opinion he is perfectly correct in doing so), iujlatus, 

 and adopted the name of salicis for the other species. It seems to me, 

 however, that the only safe course is to use Hartig's name for Uo 

 Geer's insect, unless an earlier name be discovered. 



Nematus doesatus, sp. n. 



JV! nitiilus, rufo-hiteus, antennis (vel SKpni) ,7ncso7ioti later ihus, meta- 

 nofo, ahiJominisque dorso pro parte nigris ; ore, trochanierihus, tibiisque 

 p) all id is ; alis ftavescenti-hyalinis, stigmate Jlavo-testaceo, bast vel nigro. 



Long. 3^ lin. 



$ . Antennffi shorter than the body by about three-quarters of a line, filiform, 

 tapering slightly towards the apex, 3rd and 4th joints equal, the rest a little shorter ; 

 the colour is luteous, with a black line above the whole of the joints, or more usually 

 only above the first two. Ilead luteous, covered with a wliitish down, the portion 

 below tlie antennae and the outside of the eyes white ; clypeus deeply notched ; the 

 tips of the mandibles brown ; palpi pale ; the clypeus and surrounding parts densely 

 covered with white hair ; the ocelli black. Thorax luteous, densely covered with 

 down ; the pronotum paler ; breast luteous, very smooth and shining ; the sides of 

 the mcsonotura and the metanotum black ; cenchri prominent, white. Abdomen 

 luteous, and at the base narrower tliau the thorax, and from that it gradually 

 decreases in width towards the apex, which is acuminate ; the dorsal surface (es- 

 pecially on the basal part) more or less marked with black ; ccrci very long, the saw 

 considerably exscrtcd. Feet pale luteous ; coxte, trochanters, and tibijc, whitish. 

 Wings hyaline, faintly yellowish, the costa, stigma and nervures (except at the apex) 

 yellow-testaceous. The 1st sub-marginal nervure is very faint ; the 2nd sub-marginal 

 cellule is about a quarter longer than tlie 3rd ; the 2nd recurrent nervure is nearly 

 joined to the 2nd sub-marginal. In the under-wing what Thomson calls the 

 " nervus recurrens " is joined to the " nervus transversus ordinarius," wliidi is not 

 the case in N. luleus. Aberration : a, stigma black at the base ; b, doi-sal surface of 

 abdomen devoid of black ; c, posterior wings smoky. 



The S is unknown to me. 



Larva. — Full fed. Body cylindrical. Ilead brownish-red, mouth black ; eyes 

 situated in a longish black splash, which extends from the vertex. IJody to the 

 middle of the sides brownish-red, obscured with black, the black tint being deeper 



