DO TENTHKEDINID^. 



antennae black, slightly piceous beneath ; abdomen luteous, with only 

 the borders of the sheaths of the saws below (the extremities of 

 which are visible above) black; the four front femora blue -black ; 

 front tibiae and tarsi whitish ; four hind tarsi blackish, hind femora 

 and four hind tibiae luteous in the middle, and blue-black at the 

 extremities. Wings hyaline, with yellowish nervures towards the 

 base ; stigma large, piceous, with an oblique shade beneath. 



Described from the type in the Banksian collection, which is a 

 female in very good preservation. 



There are five specimens from Hudson's Bay in the British 

 Museum, which I am inclined to regard for the present as varieties 

 of this species. The colour of the antennae, tibiae, and tarsi varies 

 from black or brown to yellowish, and in all at least the last two 

 segments of the abdomen are black. The only male closely resembles 

 the type of H. analis ; but the body is rather longer, and the wings 

 are yellowish hyaline, with a shade below the stigma, which is nearly 

 obliterated in the type by the dark colour of the wings. 



Hob. North America. 



a. 2 • (Type of species.) North America. Banksian Collection. 



b-f. $ 2 ■ St. Martin's Falls. Dr. Barnston. 



51. Hylotoma borealis. 

 (Plate V. fig. 16.) 



Exp. al. 9 lin., long. corp. 4 lin. 



Head black, face reddish ; antennae black to one third of the length 

 of the last joint, and yellowish beyond. Body wholly ruf o-testaceous ; 

 basal half of the front femora black, and the four hinder trochanters 

 and middle of the femora darker. Wings hyaline, dusky yellowish 

 towards the base ; stigma brown ; the shade beneath slightly 

 marked ; nervures piceous. 



Perhaps a variety of H. clavicornis. 



Hob. Hudson's Bay. 



a. 2 • (Type of species.) St. Martin's Falls. Dr. Barnston. 



52. Hylotoma cyra. 



(Plate V. fig. 18.) 



Exp. al. 10-11 lin., long. corp. 5 lin. 



Head, thorax, pectus, and femora shining black; antennae fuscous, 

 paler towards the extremity and beneath ; abdomen yellow, the outer 

 edges of the sheaths of the saws, and sometimes the whole sheaths, 

 black. Wings yellowish hyaline, the costal cell and all the nervures 

 on the costa and inner margins, and at the base of the fore wings, 

 yellow, the rest piceous. Stigma brown, with a sharply defined shade, 

 not extending beyond the second submarginal cell, in which a dis- 



