Vol. IX] COLE & LOVETT—NEW OREGON DIPT ERA 249 



Holotype (No. 506), male, in Museum of the California 

 Academy of Sciences. 



Allotype, a female in collection of A. L. Melander, Pullman, 

 Wash. 



Paratypes, Moscow Mt., Idaho, June 1, 1907, A. L. Melan- 

 der, collector. 



Near kincaidi and hma, characterized by pollinose band on 

 fourth segment of abdomen and dark legs with black pile. 



38. Criorhina luna Lovett, new species 



(Plate 18, fig. 24) 



Length 17-19 mm. Pile elongate; antennae brownish black; 

 general ground color black ; hind femur with spines below ; all 

 tarsi broadly flattened and deeply incised ; wings smoky brown, 

 veins dark. 



Male : 19 mtn. Antennal prominence produced ; face concave below 

 antennae then straight to oral margin, considerably produced ; face and 

 front black, covered with dense golden brown pollen; cheeks shining black; 

 above and occiput as face ; at base of antennae below, along eye margins, at 

 oral margin and about occiput, elongate golden pilose ; at base of antennae 

 above with elongate black pile ; vertical triangle with mixed black and 

 golden pile; first two joints of antennae brownish black, second reddish at 

 tip ; third segment brown, reddish at base, broader than long, outer angles 

 rounded, narrowed toward the base, the margin decidedly thinned, concave 

 on outer side, convex on inner side ; arista near outer angle, elongate, dark 

 brown; margin of antennal prominence above shining reddish brown. 



Thorax and scutellum sub-opaque greyish pollinose; a transverse shining 

 black cross-band at base of wings ; two median lines extending dorsalward 

 from front margin of thorax to shining cross-band ; on the dorsum laterally 

 are two sub-shining circular areas produced forward from the cross-band 

 into the pollinose field ; pile elongate yellow, longest on scutellum, black 

 on shining cross-band. 



Abdomen narrow, elongate ; the fifth segment large and produced, 

 adapted for sex organ ; black shining, first two segments greyish sub- 

 opaque; pile elongate yellow, reddish on disc, black on fifth segment. 



Legs dark brown, the pile golden yellow; knees and tibiae lighter brown, 

 the tips of tibiae and tarsi yellow ; hind femur not particularly thickened, 

 arcuate ; sparsely elongate yellow pilose on proximal two-thirds ; thickly 

 beset wth spines below and on distal third above ; the tarsi flattened, broad, 

 deeply incised and with tufts of heavy brown spines on the inner distal 

 angles of the segments ; tuft of coarse black pile at base of fore leg, similar 

 but more luxuriant pile at base of hind legs ; wings smoky brown, the 

 veins dark brown ; squamae and halteres brown-black, the former with 

 fringe of golden pile. 



Female : Length 17 mm. Abdomen robust. In general similar to male, 

 the front broad, and darker brown pollinose ; pruinose triangular areas on 

 second abdominal segment narrowly divided at center, reaching lateral 

 margin; on fourth segment near base with lunule-shaped opaque grey 



