5. sirex. 381 



dish brown beneath ; claws blackish ; abdomen and femora black ; 

 cenchri, hinder portion of the first segment of the abdomen, the 

 whole of the second, a row of spots at the back of the sixth, the 

 seventh and the greater part of the front of the eighth (except a 

 small triangular spot on each side in front) yellow above ; cornus 

 yellow ; ovipositor black, the neighbourhood of its base yellowish 

 beneath. Wings yellowish hyaline, with yellowish-brown nervures. 



Hah. Labrador. 

 a. $ . (Type.) Labrador. Banksian Collection. 



32. Sirex bizonatus. 



Urocerus flavicornis, Nort. (nee Fabr.) Trans. Amer* Ent. Soc. ii. 



p. 362 (1869). 

 Sirex bizonatus, Steph. III. Brit. Ent., Mand. vii. p. 114, pi. xxxvi. 



fig. 2 (1835). 



Exp. al. 1 poll. 5-8 lin., long. corp. 1 poll, ad 1 poll. 2 lin. 



Perhaps a variety of the last, but smaller and more slender, and 

 appears to be constant in coloration. Differs in the paler hind 

 legs, which are brown only at the tips of the tibiae above and at 

 the claws, and in the colour of the abdomen, which is black above, 

 with the second segment, a narrow border to the first, the seventh, 

 and more or less of the front half of the eighth, luteous above. 



Stephens has well figured the female of this species or variety ; 

 and as it is a well-known insect, I have thought it sufficient to give 

 a comparative description here. 



Hab. North America. 



a, b. 2 • (Types.) 



Britain (introduced). 



J. F. Stephens. 



c,d. rj. 



Nova Scotia. 



Lieut. Redman. 



e. 6. 



Nova Scotia. 





f-k. 6 2. 



St. Martin's Falls, Albany 

 River, Hudson's Bay. 



Dr. Barnston. 



1 2- 



Cape Krusenstern, Arctic 

 Regions. 



Sir J. Richardso 







m. 2- 



Mackenzie River. 



Dr. Rae. 



n. 2- 



Fort Churchill, Hudson's 

 Bay. 



Capt, Herd. 



o. 2- 



British Columbia, 



J. K. Lord, Esq, 



Pi<l- ?• 



Newfoundland. 



J. Milne, Esq. 



r. 2- 



Newfoundland. 





33. Sirex dimidiatus. 



Sirex dimidiatus, Westic. Thes. Ent. Oxon. p. 115, pi. xxi. fig. 5 



(1874). 



Hab. North America. 



a. 2 • North America. 



