1917] Neiv Species of Colorado Syrpkidce 221 



contour of scutellum making a narrow border on its entire posterior 

 portion; pleurae whitish polHnose, with white pile, abdomen shining black, 

 narrowly ovate, pointed at tip; first segment sub-opaque, white poUinose, 

 with white pile, second segment on the sides with a semi-quadrate 

 yellow spot; third and fourth segments with larger yellow quadrate 

 spots which touch the anterior margin of the segment, fifth segment 

 with a pair of small triangular spots. The abdominal spots are lightly 

 dusted with whitish pollen. Legs fuscous or brown, white pilose, hind 

 metatarsi not thickened, hind femora black, or having base yellowish; 

 cox£e black; wings hyaline; stigma yellowish. 



Habitat: Six females, Cherokee Park, Estes Park and 

 Carbondale, Colorado. C. S. Mead and J. C. Bradley, col- 

 lectors. July 12, 1908; July, 1913. 



Eupeodes braggii n. sp. 



Length, S to 10 mm. Eyes bare; face whitish yellow with a black 

 median line which extends from oral margin but does not reach the 

 antennae. Cheeks black. Front in male wholly yellow with black pile; 

 front in female black, fading to light yellow towards the antennae; 

 occiput silvery pollinose, with whitish pile; a brownish crescentic spot 

 above the antennas. Thorax bluish or dark metallic green with pale 

 yellowish pile; scutellum in both sexes translucent, greenish reflection; 

 posterior margin distinctly yellow. Abdomen sub-opaque, with light 

 colored pile; first segment and posterior portion of all segments shining. 

 The second segment bears two oblong yellowish, attenuated, spots which 

 are contiguous with lateral margins of abdomen. vSegment three and 

 four, each with a pair of slightly arcuate yellowish spots, which are 

 separated from the lateral margin of the abdomen, inner angles rounded, 

 outer anterior angles acute. Posterior portion of segments four and 

 five narrowly margined with yellow. Legs yellow, or brown; femora 

 black at base; wings hyaline. 



Habitat: Seven specimens, 2 cf, 5 9, Grand Junction, 

 Fort Collins, Colorado. L. C. Bragg and G. P. Weldon, 

 collectors, September 8, 1908. 



Eupeodes weldoni n. sp. 



'Length, 10 mm. Eyes bare, face whitish, white pilose, with a 

 black median line, extending from oral margin almost to the base of 

 antennae; cheeks black, upper front in female black, lower part yellow, 

 with or without brown crescent-shaped spots above the roots of the 

 antennas. Vertex greenish, with light colored pile; occiput light with 

 light pile. Antennae varying from reddish brown to black. Thorax 

 blackish metallic green, with pale yellowish pile; scutellum in female 

 more or less translucent with yellowish pile and distinctly margined 

 with yellow; abdomen black, sub-opaque; thinly pilose with whitish 

 and black pile. The first segment and posterior portion of the second 

 and third shining black; posteriorly, the fourth and fifth marginate 

 with yellow; the fifth also yellow laterally, giving a complete yellow 



