Vol. IX] COLE & LOVETT-NEW OREGON DIPTERA 239 



inence produced, face practically straight considerably prodticed tubercle 

 .mall obtuse located about three-fifths of distance from tose of antennae 

 tTorkl nSrSn^in pmfile below base of eye. At base of ^ntennje below 

 It ^rghTof e^e and at base of antennal prominence are small triangular 

 soo^of greyish pollen; antenna short, first two jomts shimng brown sh 

 black thfrd rounded, Reddish brown, lighter at base and covered with 

 spars^ greyish pollen; arista black, practically bare, thickened for one-third 



^'Trofax^'n^USteHumlting black with brassy .reflections; covered 



thSi/hout with ebr^S moderately dense, brown pile, longer a margin 



of SLtdlum on ple^^^^^ with black; entirely free of bristle-hke hairs 



AMomrWue-black with cobalt reflections, opaque black on disc; covered 



^'LTgf Sck tet\^nJ^p^xir'?hiJ3 ?f°S. brown or yellow, base of 

 all feLra^ith elongate brown pile, apical two-thirds of front, half of 

 m ddl^and S of hind femora with elongate coarse black pile ; under sur- 

 Sce of Wnd femur with moderately dense, elongate spme-bke black hairs, 

 tibTs and tarsi with golden pile; wings smoky throughout; veins dark 

 brown at base; squai4 smoky white with margm of dense golden pile, 

 halteres with dark knobs. 



Holotype (No. 494), male, in Museum of California 

 Academy of Sciences, collected at Corvallis, Ore., April 14, 

 1917, by W. T. Chamberlin. 



Twelve specimens of this species, collected from Hoquiam 

 and Satsop, Wash., April 29 to May 20, 1914, by Burke, were 

 observed in the National Museum. 



This species is near C. lasiophthalma, but is markedly dif- 

 ferent. It more nearly approaches C. grossa but varies in the 

 pile and legs. The elongate brown pile of the head and body 

 and elonga'te black pile of the eyes are characteristic. 



26. Chilosia nigrovittata Lovett, new species 



Eyes moderately elongate, brown pilose; face but slightly 

 concave, tubercle reduced ; body covered with moderately long 

 brown and yellow pile; across dorsum of thorax with well 

 defined band of black pile. Length 10.5 mm. 



Male- Face not produced, very slightly concave to the small obtuse 

 tubercle with a short shallow concavity before oral margm ; cheeks shining 

 black with sparse yellowish brown pile extending around occiput to vertex; 

 frontal and vertical triangles black swollen, with ,<;oarse black pile frontal 

 triangle with median groove and with fine yellow pile about margin 

 antenna brownish black, third joint orbicular greyish s^hading to dull 

 reddish below; arista black almost to base, thickened on basa hfth , face 

 shining- black bare ; eye margins sparsely yellow pilose ; greyish pollen be- 

 low "he antennal prominence connected briefly with similar triangular 



'"'xhofax^nd'scSellum black, subshining; extreme front of humeral angle 

 with spot of grey pollen ; a triangle on dorsum of thorax m front and the 



