TBIOHIOSOMA VITELLIN./E. 19 



Synopsis of Species. 



1 (2) Tibiae fuscous. Betuleti. 



2 (1) Tibiae testaceous or yellowish. 



3 (4) Femora clothed with black hairs, distinctly violaceous ; abdomen 



clothed at base with yellowish hairs, with short fuscous hair 

 at the middle, and with long yellowish or greyish hair at 

 apex. Scalesii. 



4 (3) Femora clothed with pale hair. 



5 (6) Abdomen dull black, covered uniformly with long grey hairs, 



the apex and sides of abdomen sometimes reddish ; the tibiae 

 not darker than the tarsi. Lucorum. 



6 (5) Abdomen bronzy black, the hair on base longer than on middle 



or apex; the apex, sides, and belly usually ferruginous, 

 rarely black ; tarsi paler than tibiae. Vitellinse. 



1. TRICHIOSOMA VITELLIN^I. 

 Vol. I, PI. X, figs. 14 and 15, Larva. 



Tenthredo vitellinse, Lin., F. Su., 386. 



Trichiosoma laterale, Leach, Z. M., iii, 109 ; Curt., B. E., i, pi. 



xlix; Ste., 111., vii, 9, 2. 

 Cimbex vitellinse, Br. and Zad., Schr. Ges. Konig., iii, 259, Taf. 



iii, f. 1 (lar.). 

 Trichiosoma salicis, Htg., S. E. Z., i, 19. 



vitellinse, Thorns., Hym. Sc., i, 24, 3 ; Cam., Proc. 



N. H. S. Glas., iii, 205 (lar.), Fauna, 46, 



2; Andre, Species, i, 28; Cat., 3,* 4. 

 Tenthredo amerinse, De Geer, Mem., ii, 2, 948, 3 (non L.). 



Black, somewhat bronzy; tibiae reddish-testaceous, tarsi testaceous, 

 wings yellowish, the apical margin of the wings fuscous, costa testa- 

 ceous, stigma bluish-black ; the apex of abdomen, the sides, and more 

 or less of the belly, ferruginous. The hair on the head is black or 

 fuscous; on thorax and abdomen pallid or yellowish. It is thick and 

 long on the base of the abdomen, but becomes shorter and thinner 

 towards the apex, where it is silky. 



Length 712 lines. 



Ab. Abdomen quite black. $ and . 



The amount of reddish colour on the abdomen varies 

 considerably ; sometimes the apical third above, the 

 sides and the belly from base to apex are reddish, some- 

 times only the sides and apex, and more rarely the 

 reddish colour is entirely absent. The latter is the 

 case with all the specimens ( ? and $ ) I have bred 

 from the larvae figured on PI. X, Yol. I, figs. 14 and 15) 

 these specimens being also much smaller (7 lines only) 

 and more shining than usual. In the 3 the hair on 



