THE CANADIAN ENTOMOLOGIST. 259 



locality. Snow says (Kan. Univ. Quart., 1895, P- 242): "So far as I 

 know this species is taken only on the summits of mountains of consider- 

 able height." My specimen from Port Renfrew was taken on low ground 

 by the sea shore. The species has not previously been recorded so far 

 north, and perhaps this is only another example of tlie law that mountain 

 species approach the sea level in higher latitudes. 



55. Eristalis tenax (Linne). — Abundant everywhere. Taken all 

 summer. Port Renfrew, Victoria, Vancouver, and also at Seattle, Wash. 

 Specimens have also been received from Vancouver, Victoria and 

 Wellington, from Mr. Harvey. 



56. Eristalis lati/rojis, Loew. — Victoria, July 17, 1901. Taken also 

 at Banff, Alberta, June 17, 1901. 



57. Eristalis montafius, Williston. — A single specimen, female, taken 

 at Vernon, Sept., 1902, by Harvey. 



The eyes are separated about as in the female of bastardi or 

 occidejitalis. The front is reddish-yellow poUinose on the sides like the 

 face ; vertex black pilose. The centre of the disk of the thorax has some 

 black pile intermixed with yellow. Otherwise the specimen tallies 

 exactly with Williston's description, and I have no hesitation in placing it 

 here. 



58. Eristalis occidentalis, Williston. — Apparently a common species. 

 Port Renfrew, Aug. 16, 1901 ; Victoria, July 20, 1902. Specimens from 

 Harvey, taken at Vancouver, June 21, 1902, and July 20, 1903. 



59. Eristalis flavipes, Walker. — A single specimen from Harvey, 

 taken at New Westminster. 



60. Eristalis obsciirus, Loew. — Port Renfrew, Aug. 10, 1901 ; 

 Agassiz, July iS, 1902. Taken by Harvey, Vancouver, July 29, 1902. 

 The writer has taken the species also at Seattle, Wash. 



6r. Eristalis hirtus, Loew. — Two specimens, taken by Harvey at 

 Mt. Cheam, Aug. 5, and another at Vancouver, Aug. 29, 1903. 



62. Helophilus latifrons, Loew. — One specimen sent me by Harvey, 

 taken at Vernon. 



(Helophilus similis, Macquart, BanfT, Alberta, June 17, 1902.) 



63. Helophilus bilinearis, Williston. — One specimen at Port Ren- 

 frew, July, 1902. Taken also at Seattle, Wash., July 15, 1901. These 

 show no important differences from specimens taken at Fargo, N. Dak. 



