Vol. IX] COLE & LOVETT—NEW OREGON DIPTERA 243 



Abdomen : first segment opaque greyish on the disc, narrowly yellow on 

 lateral and posterior margins; second segment narrowly yellow on the 

 anterior margin, the yellow expanding on the anterior lateral margins to 

 form a large quadrangular spot, connecting with the lateral margin nar- 

 rowly in front and with the yellow of first segment; remainder of second 

 segment opaque brownish black, posterior margin with narrow line of 

 white ; succeeding segments sihining brownish black with sparse light golden 

 pile throughout. 



Legs black, tibiae and tarsi dark brown, the middle tarsus of hind pairs of 

 legs lighter brown, briefly white pilose ; wings hyaline ; a dark smoky 

 indefinite area extending from the basal tip of the stigma downward to the 

 discal cell ; stigma light yellow ; basal portion of wing veins yellow, apical 

 portion brown. 



Holotype (No. 499), female, in Museum of the California 

 Academy of Sciences, collected at Hood River, Ore., June 4, 

 1917, by Frank R. Cole. 



Characterized by smoky spots in wing and elongate quadrate 

 yellow spot on second abdominal segment. 



31. Brachyopa gigas Lovett, new species 

 (Plate 18, fig. 21) 



Face, cheeks, and antennae uniformly yellow; arista moder- 

 ately plumose; thorax with four brown lines, wings of a 

 brownish tinge, without spots or markings. Length 9.5 mm. 



_ Male: Face, front, cheeks and antennae light yellow, briefly white pol- 

 linose; cheeks with hint of brown; antennae with hint of reddish; arista 

 somewhat thickened and light yellow on basal fourth, remainder brown, 

 plumose, pile short at tip; vertical triangle brown, ocelli reddish, occiput 

 briefly short brown pilose. 



Thorax and scutellum brown subshining covered with short, bristle-like, 

 golden pile; dorsum of thorax with greyish pollen and four longitudinal 

 brown lines, brown dashes above base of wings and narrow upper margin 

 of meso-pleura dark brown. 



Abdomen brown, sihining, posterior margin of all segments with cross- 

 band of darker brown connecting with similar lateral margin ; disc of first 

 segment, and a median line on second and third segments which may or 

 may not reach the posterior margin dark brown. Pile of abdomen similar 

 to that on thorax, somewhat less coarse. 



Legs dark brown, apical tarsi of front and middle legs and all tarsi of 

 hind legs blackish^ Pile of legs as that of thorax. Posterior to attachment 

 of front legs and anterior to attachment of hind legs the pectus is black. 



Wings brown, veins dark brown, stigma yellow ; fourth longitudinal bent 

 sharply downward at apex of discal cell, the flexure straight, with a short 

 spur and forming an obtuse angle with the straight marginal cross-vein 

 (See fig. 21). 



Holotype (No. 500), male, in Museum of the California 

 Academy of Sciences, collected at Blue Mts., Washington, 

 July 15, 1896. 



