426 THE CANADIAN ENTOMOLOGIST 



of dorso central bristles close to the transverse suture. Scutellum 

 bearing four bristles, the apical pair being weaker. Halteres yellow. 

 Abdomen — Brown, becoming darker toward the posterior; the 

 anterior lateral portions are yellowish. Short hair whitish. 

 Macrochaetas black and prominent; Genital segment broad, flat, 

 and yellowish, with a short dark brown stripe on the middle of 

 the base; as long as the last two abdominal segments taken 

 together. 



Legs — Yellowish brown with a dark stripe on the under side 

 of each of the hind femora. Fore femora not thickened. Hind 

 tibae with short strong bristles. Bristles black. 



Wings — Broad, reticulate with a white crescent seaming the 

 tip from the second vein to near the middle of the second posterior 

 cell. The reticulation is made up of nearly uniform hyaline dots 

 rather evenly scattered, but wanting in that part of the grayish- 

 brown color which adjoins the white crescent. Stigma darker with 

 two small light coloured spots, the one in the apex being larger 

 and more noticeable. Second vein with a slight convexity above 

 the small crossvein. 



Hab — Sunset, Colo., July 13, 1913; collected by Van Duzee 

 at an altitude of 8,000 feet. 



This specimen closely resembles Eutreta sparsa, but differs 

 principally in not possessing black spots on the face, in having 

 larger hyaline spots on the wing with a light coloured spot in the 

 stigma and without a small clear stripe at the tip of the first 

 longitudinal vein. 



Acidia johnsoni, n. sp. 



Type — One female from Colorado. 



Head pale yellow; thorax and legs yellowish gray; abdomen 

 black with posterior bor- 

 ders of the segments yel- 

 low. Wings banded with 

 dark brown; the spaces 

 whitish hyaline. Scutellum 

 with two bristles. Posterior 

 basal cross-vein obtusely 

 angled. Small cross -vein 

 slightly beyond the middle 



Fig. 34 — Acidia johnsoni. wing. 



