Vol. IX] COLE & LOVETT—NEW OREGON DIPTERA 225 



6. Eclimus magnus O. S. 

 (Plate 14, figs. 5, 5a) 



Male : Length IS mm. Very similar to the female. Pile of the occiput 

 black, as is the pile on antennae and beneath the head. 



Thorax black and muricate ; the pile on dorsum and on pleura black ; 

 scutellum with longer Wack pile on surface. 



Abdomen rather long and slender and clothed with short black pile ; 

 posterior margin of the first segment with a conspicuous fringe of white 

 pile ; a very narrow fringe on segments two, three, four and five ; rest of 

 abdomen, including genitalia, black pilose. 



The black pile on the coxae is longer and thicker than on the femora. 

 The wings are as in the female, except for the strong denticulations on the 

 cosita (Fig. 5). Above the anterior cross-vein the membrane appears to 

 be bent inward; this hollow is darkened. 



Allotype (No. 468), male, collected at Joseph, Oregon, in 

 Museum of the California Academy of Sciences. 



The female was described by Osten Sacken in "Western 

 Diptera," from a specimen taken on Vancouver Island. 



There are five males in the author's collection, taken at For- 

 est Grove, from June 3 to June 18, 1918. One is only 8 mm. 

 in length. A female was taken at Parkdale, Ore., June 18, 

 1917 (Cole). 



7. Bombylius silvus Cole, new species 

 (Plate 14, fig. 6) 



Female : Length 8.5 mm. Frons and occiput gray black, face obscure 

 brown ; mystax thin and mixed black and yellowish ; antennae black, the 

 first two joints with black pile and together scarcely more than one-half 

 as long as third; a black stripe from antenna to eye (Fig. 6) ; frons with 

 sparse golden tomentum; occiput with yellow tomentum and an unusual 

 fringe of black bristly pile on the line of the ocellar bristles, present in 

 some other diptera ; head below with white pile ; proboscis a little more 

 than three times the length of the head. 



Thorax and scutellum black, semi-shining, with a metallic blue lustre, 

 and clothed rather densely with a fur-like blackish brown pile which in 

 certain hghts appears yellowish ; thorax and scutellum with some golden 

 tomentum above; the gray black pleura obscured by white pile; some brown 

 pile under the wing; stem' of halteres brown, the knob whitish. 



Abdomen black with black pile most of which is longer and more bristly 

 than that on the thorax; sides of second, third and fourth segments with 

 finer brownish black pile ; a median dorsal line of white tomentose spots 

 on segments two to six, quite noticeable on the dark background ; on each 

 side of these spots there is some short yellowish pile ; last abdominal seg- 

 ment with some yellow tomentum above ; venter black, clothed mostly with 

 white pile. 



Femora and tibiae reddish, with whitish tomentum; tarsi blackish, knees 

 black ; wings gray, the costal region darker from base to tip of costal cell, 

 this darker region with a brownish tinge. Wings rather long and narrow. 



