Ixiv NATURAL HISTORY. 



A pair only of this species was preserved, in size and many respects it resembles B. 

 Kirbiellus, but the indistinct and somewhat double band of black hairs across the ab- 

 domen will distinguisli it, and tlie yellow pile inside of tlie tarsi in the male and the 

 black in the female, are sufKcient characters I think to justify its being separated from 

 the former species. 



R. Arcticus. (Kirby in the Supplement to the Appendix of Captain Parry's 1st 

 Voyage, p. ccxvi.) 



An imperfect male was the only specimen brought home of the species. 



As Commander Ross's observations embrace the above three species, I shall be under 

 the necessity of imbodying them ; but that is of little importance, as their habits must 

 be very similar. 



" The largest bee seems to be the earliest insect on the wing ; it is generally seen 

 early in June, but the smaller specimens do not appear until the middle or end of 

 July." It may be observed that the females are the largest, and the next in size 

 the males; these make their appearance first, and the neuters, or working class, come 

 later, when more flowers probably are out, and their labours are less interrupted by 

 unsettled weather. 



"The first female was seen on the 7th of June, 1830, they were very abundant on 

 the 2d of July, and on the 14th a neuter was taken ; on the following day they were 

 veiy numerous, and the females less abundant, but a few were observed as late as the 

 18th of August, soon after which time they seem in a very weak state." 



" In 1831 the first bee was seen on the 19th of June, on the '26th two females, and 

 on the 8th of July several were captured ; on the 14th many females, on the succeeding 

 day some neuters, and on the 27 th of August, 1832, a large bee was seen." 



ORDER TRICHOPTERA. 



Fam.—PIIUYGANID^. 

 Gen. 7G0.— TINODES? (Leach.) 



9. Ilirtipes. Slate colour, wings pale fuscous. 

 Length two lines and a half, breadth nine lines. 

 Pale slate colour, sparingly clothed with long whitish hairs ; head small ; eyes pro- 



