THE CANADIAN ENTOMOLOGIST. 



24. Syrphus guinqneli/nbalus, Bigot. 



A single male specimen taken at Mt. Cheam, Aug. 6, 1903, by R. 

 V. Harvey, and one female in the U. S. National Museum from Mr. 

 Coquillett's collection, taken by W. H. Danby, and labeled merely " Br. 

 Columbia." 



This species was described from a single female specimen from 

 California (Ann. Soc, Ent. France, 1884, 91), and has not since been 

 mentioned. The male taken by Harvey is sufficiently like the female in 

 the National Museum, and agrees well enough with Bigot's description, so 

 that there can be little doubt as to its identity. The last two abdominal 

 bands on the posterior margins of segments 4 and 5 are wanting in the 

 male. This is the only important difference in the sexes. 



25. Syrphus disjecius, Williston. 



Two female specimens taken by Harvey, Hope Mts., July 18, 1906, 

 compare well with Williston's description of the male. They also agree 

 with the female which Snow (Notes and descriptions of Syrphid?e, Kansas 

 Univ. Quart., July, 1892) lists from Colorado, in having whitish pile and 

 light-coloured lateral margins on the thorax. 



26. Syrphus ifisolitus, sp. no v. (Fig. i.) 



Male. — Face, front and cheeks entirely shining bronze-black, with no 

 indication of yellowish ; with black pile on the face, front and vertex. 

 Face and front rather swollen, the former nearly perpendicular below the 

 antennae ; tubercle broadly rounded, not prominent. Antenna? dark 

 brown, yellowish below on second and third joints. Occiput with black 

 pile above and yellowish pile below. Thorax bronze-black, with light 

 yellow pile on the sides and black and yellow mixed on the disc (in one 

 specimen the whole disc is covered with black pile, and that on the sides 

 is reddish). Scutellum yellow, with dark reflections, the extreme base 

 black. Abdomen : first segment black, shining ; segments 2, 3 and 4 

 opaque-black except the outer posterior angles, which are shining black, 

 yellow as follows : a pair of spots on the middle of segment 2 attenuated 

 at both ends and reaching forward at the outer ends to the margin, bands 

 of the third and fourth segments entire, attenuated at their ends and 

 nearly or quite reaching the lateral margins ; segment 4 narrowly yellow 

 on the posterior margin, and segment 5 with an inconspicuous yellow 

 spot on the anterior outer angle. Hypopygium shining black. Legs : 

 first and second pairs yellow, bases of the femora black ; third pair dark, 

 the knees lighter. Halteres yellow. Wings nearly transparent, slightly 

 tinged with dark, stigma dark brown. Length 7 to 8 mm. {J7isolitus 

 - unusual). 



