Manchester Memoirs, Vol. xliii. (1899), No. 3. 17 



The radial nervure is received in the middle of the third 

 cubital cellule, which is not much longer than the third, 

 the first recurrent nervure is received in the middle, the 

 second in the basal third of the cellule. Abdomen black, 

 the apices of the basal segments olive-coloured. 



Tenthredo BICARINATA, Sp. nov. 



Ferruginea ; apice antennaruin lineisque duabus meso- 

 noti nigris ; alls fusco-violaceis, stigmate nervisque nigris. $ , 



Long, to apex of first abdominal segment, 10 mm. 



Antennae rufous, yellow towards the middle ; the 

 apical half of the sixth and the apical three joints entirely 

 black. Head rufo-ferruginous, the base of the clypeus 

 and of the labrum, the lower orbits outside, and the 

 mandibles, yellow ; the apex of the mandibles black. 

 The middle of the vertex bounded by two deep, narrow 

 furrows, and having in the centre, near the apex, a 

 longitudinal, not very clearly defined, keel ; outside the 

 anterior ocellus is a narrow keel ; from the apex of these, 

 on the inner side, a stout keel runs to the base of the 

 antennae. The incision on the apex of the clypeus is 

 broad and not very deep ; the hinder edge of the head is 

 sharply keeled all round. Mesonotum closely punctured, 

 the middle lobe furrowed down the middle ; its apex 

 lemon-yellow ; the middle lobes are broadly black on the 

 outer side, and covered with short, black hair. Scutellum 

 sharply pyramidal, thickly covered with longish, black 

 hair, the top smooth and shining, the post-scutellum 

 aciculated and with only a few punctures. Propleurae 

 smooth, impunctate, black, except on the top, and more 

 narrowly at the base and apex. Mesopleurse rugosely 

 punctured, most coarsely on the lower side ; tuberculated 

 and keeled on the lower edge at the base and more 

 distinctly behind, the apex excavated, black above, the 



