260 THE CANADIAN ENTOMOLOGIST. 



64. Helophilus pilosus. Hunter.- -Described in 1897 from Br. Col., 

 one female specimen. No other data given. I have not seen the species. 



65. Pterallastes perfidiosus, Hunter. — Described in 1897 from two 

 female specimens from Br. Col, No other data given. I have not seen 

 the species. 



66. Triodonta curvipes (Wiedmann). — A male and female of this 

 peculiar species taken at Victoria, July 20, 1902, are a trifle larger and 

 darker in colour than specimens from the Atlantic coast, but in other 

 respects are similar. 



67. Criorhina Kincaidii, Coquillett. — Taken by Harvey, at Van- 

 couver, April 9 to May 19, and at Wellington, April 17. In all, 10 

 specimens of this striking species, nine males and one female, have been 

 sent me by Mr. Harvey. They show considerable variation in colour of 

 the pile of the thorax and abdomen, but otherwise all agree very well with 

 Coquillett's description. The pile of the thorax varies in regard to the 

 extent of the black, which may include all of the hinder part of the 

 mesonotum except the angles, and all of the scutellum except a fringe of 

 yellow hairs around the edge, or the black may be limited to a bar across 

 the mesonotum, leaving the hind border as well as the scutellum yellow. 

 The greatest variation, however, is seen in the pile of the abdomen. As 

 one extreme, the pile of segments 2 and 4 is light yellow, with that of 3 

 black, or at most with a few reddish hairs intermixed, while at the other 

 extreme, segments 2, 3 and 4 are covered with reddish pile, with no trace 

 of black on 3. Practically all the intermediate stages are shown by my 

 nine specimens. All agree in having long light yellow pile on the side of 

 segment 2, in having some yellow on the posterior margin of 4, and in 

 having 5 black, with at most a few reddish hairs. In most of my specimens 

 a fringe of long yellow hairs projects, moustache-like, from the epistoma 

 in front. It appears to be broken off in some specimens. The tibiae and 

 tarsi vary in colour from brownish to yellowish. The last joint of the 

 tarsus is always brown except the pulvilli, which may be yellow. 



The female resembles the male closely. The face is only thinly 

 pollinate with yellow. The eyes are separated by about the length of a 

 millimeter. The front is coloured as in the male. The vertex is black. 



68. Criorhina tricolor, CoqmW&ii. — Vancouver, May. 10, 1902; Mt. 

 Cheam, Aug. 5-1 1, 1903; Grouse Mt., July 19, 1903. Nine specimens 

 in all, both se^es, from R. V. Harvey. I have placed these specimens in 

 this species provisionally, as I have not been able to make out any 



