8 TENTHREDINID^. 



21. Cimbex hudsonica. 

 (Plate I. fig. 4.) 



Exp. al. 1 poll. 3 lin., long. corp. 7 tin. 



Head and thorax black above and below ; prothorax very pale 

 yellow ; coxae blnish black ; jaws and femora reddish brown. 

 Antennae, tibiae, and tarsi luteous. Abdomen with the first two 

 segments black above, the second edged behind with chestnut ; the 

 succeeding segments chestnut in the middle ; the last two and the 

 under surface almost entirely chestnut. Segments 3 to 6 with a 

 black spot on the edge of the chestnut colouring, expanded on 

 segments 4 and 5 into two long triangles, which almost meet on 

 the back; the sides of these four segments are straw-coloured. 

 Wings as in C. violacea, hyaline, yellowish towards the base, and 

 dusky at the tips ; the oblique shade running from the stigma across 

 the median cell of the fore wings unusually well defined. 



Not unlike a Trichiosoma in size and general appearance, though 

 it has the antennae of Cimbex, 



Hab. Hudson's Bay. 



a. $ . (Type of species.) St. Martin's-Falls. Dr. Barnston. 



22. Cimbex macleayi. 



Cimbex macleayi, Leach, Zool. Misc. iii. p. 103, no. 2 (1817). 



Hab. Haiti. 



23. Cimbex klugii. 



Cimbex klugii, Leach, Zool. Misc. iii. p. 105, no. 6 (1817). 



Hab. Haiti. 



24. Cimbex venusta. 



Cimbex venusta, Perty, Bel. Anim. Art. p. 129, pi. xxvi. fig. 2 

 (1830-34). 



Hab. Minas Geraes*. 



2. TRICHIOSOMA. 



Trichiosoma, Leach, Zool. Misc. iii. p. 108 (1817). 



1. Trichiosoma lucorum. 



Tenthredo lucorum, Linn. Syst. Nat. i. p. 555, n. 4 (1758) ; Faun. 

 Suec. p. 389 (1761). 



* It has been suggested that this species is only C. lutea with a wrong 

 locality ; but if the figure is correct, the wings are smaller and of a different 

 shape. 



