BLENNOCAMPA SERICANS. 233 



Head black, slightly pilose, and with a horse-shoe 

 shaped impression on the vertex. The ground colour 

 of the body is greyish- white, but it is covered with a 

 bluish powder. Skin much wrinkled and covered on 

 the upper part with black tubercles, each ending in 

 short black spines, which form a sort of crown ; the 

 middle spine is the longest. There are three rows of 

 the tubercles on the abdomen on each side of the 

 central furrow; on the fore region they are more 

 numerous and more irregularly arranged. The skin- 

 folds over the abdominal legs are also beset with black 

 spines. Thoracic legs black; those on the abdomen 

 are short, conical, and coloured like the body. 



They feed on Convallaria multiflora, C. polygonata, 

 &c., usually feeding along the edge of the leaf, or 

 more rarely in the centre. When full fed they become 

 entirely bluish-grey, and enter the earth, where a 

 cocoon is spun. They appear in June and July ; the 

 imago in the following May. 



Found near Putney by Curtis. 



Continental range : Sweden, Holland, France, Ger- 

 many, Italy and Russia. 



Body and legs black ; knees and four anterior tibiae testaceous 

 in front. Antenna? shorter than thorax, thick, the third joint 

 about one half longer than fourth. Transverse radial nervure 

 received a little beyond middle of cellule, third cubital cellule 

 almost shorter and much wider than second ; tr. median 

 nervure received in front of middle of cellule. Head scarcely 

 dilated behind the eyes ; frontal sutures distinct ; frontal fovea 

 large, oval ; pentagonal area not indicated ; clypeus slightly in- 

 cised. Abdomen longish, sharply pointed at apex (Species 2). 



2. BLENNOCAMPA SERICANS. 



Tenthredo sericans, Htg., Blattw., 275, 33. 



Slennocampa sericans, Andre, Species, i, 308 ; Cat., 37,* 7. 



Black ; sides of abdomen and legs covered with a grey pubescence 

 knees and tibia? in front whitish-testaceous. Antenna) as long as the 

 head and thorax, thick, bare, the third joint a quarter longer than the 

 fourth ; the joints not closely separated. Front smooth, with scarcely 

 any pubescence; the antennal fovea large; frontal sutures clearly 

 defined. Clypeus slightly incised ; tips of mandibles piceous. Abdomen 



