TAXONOMY OF MUSCOIDEAN FLIKS — TOWNSEND 11/ 



Length of female, 9.5 to 12.5 mm. ; of male, 8.5 to 9.5 mm. Buccse 

 black, beard black. The two Stickeen River females and one of 

 those from Kaslo, being the three largest specimens, show the buccae 

 with a good reddish tinge on anterior half, the two males and the 

 other Kaslo female not. Third posterior intra-alar bristle absent. 

 Frontalia bright orange red on anterior portion, in the Stickeen 

 River male more of a yellowish red, in the Kaslo male a brownish 

 yellow. Parafacials, facialia, epistoma, palpi, and apex of second 

 antennal joint with base of third joint nearly the same color as the 

 frontalia anteriorly, but sometimes a lighter shade of same color. 

 Female front over one-third of head width, male front about one- 

 twentieth of head width. Thorax faintly silvery white dusted, most 

 thickly so on front border. Abdomen metallic green to blue, dis- 

 tinctly silvery pollinose in certain lights. Wings clear, with more 

 or less distinct flecks of black on humeral, small, and basal cross- 

 veins, origin of third vein, and apex of auxiliary. Alulae well tinged 

 with smoky, appearing quite black if resting against thorax or base 

 of wing, tegulae blackish with narrow white margins. 



Type.— Cat. No. 10,884, U. S. N. M. (Stickeen River, British 

 Columbia). 



Calliphora popoffana, sp. nov. 



One female, Popoff Island, Alaska, July 16, 1899. Harriman Ex- 

 pedition. T. Kincaid, Coll. 



Length, 10.5 mm. Buccal black, beard black. Front and face 

 black, with a faint silvery white pollen distinctly to be seen in certain 

 lights, even on facial plate, and especially on the broad frontalia and 

 on the parafacials. Palpi light reddish yellow, facialia and epistoma 

 darker reddish yellow, second antennal joint reddish, rest of an- 

 tennae black. Front distinctly more than one-third head width. No 

 trace of third posterior intra-alar bristle. Wings quite clear, even 

 at base, tegulae white. Abdomen metallic green. Legs black. The 

 plumosity of the arista is much shorter than in the other species. 



Type.— Cat. No. 10,885, U. S. N. M. 



A male from Bear Lake, British Columbia, 7,000 feet, R. P. 

 Currie, Coll., measures 7 mm., and may be this species. The front 

 is about one-eighth head width. The parafacials and narrow para- 

 frontals are strongly silvery white; also facial plate. The frontalia 

 are brownish. Tegulae blackish. Wings with two smoky streaks 

 on costal half. Abdomen metallic blue, silvery white dusted. The 

 antennae are paler on basal half of third joint. Otherwise it agrees 

 with the female just described. The plumosity of the arista is quite 



