Vol. IX] COLE & LOVETT—NEW OREGON DIPTERA 231 



yellow ; beard and pile of lower occiput white ; upper occiput and frons 

 with black pile, long on the frons ; third antennal joint orange-yellow, the 

 style black and about one-fourth as long as the third joint; first two an- 

 tennal segments with black pile. 



Thorax gray-pollinose with a median geminate stripe ; a round black 

 spot on each side at about the middle; a spot over the humeri that shows 

 dark in certain lights ; scutellum rounded and polished black, with long 

 black pile ; thorax quite thickly covered with black pile about as long as the 

 first two antennal joints ; pleura, front coxae and the outside of the two 

 hind pair thickly gray-white pollinose ; pile in front of halteres mostly 

 black; halteres yellow; pre-scutellar callosities and a small space before 

 the scutellum shining black. 



Abdomen shining black with tufts of golden pile on the segments (Fig. 

 13) ; second, third and fourth segments with posterior silvery pollinose 

 bands, wider in the middle ; the silvery posterior margin wider on the sec- 

 ond segment, and the golden pile on the dorsum shorter than on third 

 and fourth ; fifth and sixth segments short, polished blue-black as are the 

 genitalia, with sihort black pile ; venter black, thinly covered with rather 

 long golden pile. 



Femora black ; front tibiae and tarsi yellow, paler than others, with a few 

 white spines ; legs with black bristles, very dense on the hind tibiae. Front 

 tibiae and tarsi short golden pilose behind. Wings grayish hyaline, the 

 cross veins faintly infuscated. 



Holotype (No. 479). male, Joseph, Ore., no other data, in 

 Museum of CaHfornia Academy of Sciences. 



This species is near aurifex and pulchcr and the male will 

 run to this group in Back's table of species (Trans. Am. Ent. 

 Soc. XXXV, p. 261). 



16. Cyrtopogon anomalus Cole, new species 



(Plate 16, fig. 14) 



Male: Length 11 mm. Head black in ground color, concealed by dense 

 gray pollen, silvery in certain lights. Face not projecting (Fig. 14c) ; 

 antennae black; third joint pointed, arista two-jointed; hair and bristles of 

 head white; some blackish hairs on oral margin; pile of face very thick 

 and quite long. 



Thorax black, the ground color concealed by pollen ; dorsum with brown 

 pollen above, gray around margins ; a median dark double stripe reaching 

 beyond suture ; dark indistinct marks on each side ; dorsum with mixed 

 brown and black pile and bristles, whitish posteriorly; scutellum gray- 

 pollinose with long white bristles, mostly on border; hair on dorsum; all 

 the pile of pleura white ; knob of halteres yellow, the stem blackish ; pleura 

 silvery gray-pollinose. 



Abdomen very broad for this genus, narrowed somewhat at the base 

 and apex; gray-pollinose; dorsum of abdomen largely shining black; a 

 basal mark on all segments, reaching nearly to lateral margin on segments 

 4, 5 and 6, and leaving only a narrow posterior margin of pollen on 4 and 

 5 ; genitalia black, shining ; pile on first three abdominal segments white, 

 on remaining segments, and genitalia golden yellow ; venter gray pollinose ; 

 white pile on basal half, golden on apical half. 



Femora black except extreme base, which is yellow. Base of front tibiae 

 and basal half of two hind pair yellow ; tarsi blackish except base ; bristles 



