Vol. IX] COLE & LOVETT—NEW OREGON DIPTERA 237 



wings hyaline, in certain lights with s>trong prismatic colors on the mem- 

 brane; anterior cross-vein near the middle of the discal cell, slightly 

 proximad. 



Female : Similar to male. Pollen on frons and face more brown in color, 

 the pile and spines blackish and brown instead of white; spines and pile 

 beneath basal joints of antennae black; thorax almost all brown pollinose 

 the brownish tinge reaching down on pleura ; silvery pollinose spots on the 

 posterior angles of the abdominal segments larger than in male. Segments 

 six and seven wholly polished black. 



Holotype (No. 489), male, and allotype (No. 490), female, 

 in Museum of California Academy of Sciences, both collected 

 at Dee, in the Hood River Valley, Oregon, August 1, 1917, by 

 Leroy Childs. 



This species is placed in Cophura because there is no other 

 genus to which it can better be referred. It differs from any 

 of the varied species that make up this group. 



23. Chrysoceria pollenia Cole, new species 



(Plate 17, fig. 18) 



Male: Length 11.5 mm. Antennae, palpi and proboscis black; head 

 golden yellow pollinose, dense on frons and face ; mystax golden, ©cellar 

 bristles yellow ; ihair and bristles on occiput yellowish white ; hair on an- 

 tennae brown. 



Thorax shining black, densely covered with golden yellow pollen ; median 

 dorsal black stripe reaching to scutellum, divided by a narrow yellow line 

 (Fig. 18); pile and bristles of thorax yellow; two large black spots on 

 either side of median stripe, divided at suture ; a smaller black spot outside 

 these, back of humeral callosities ; scutellum densely golden pollinose ; 

 metanotum polished black below scutellum, golden at sides ; halteres 

 yellow. 



Abdomen black in ground color, golden pollinose, with pale yellow hair; 

 base of segments black ; genitalia black, with yellow pile. 



Femora shining black ; tibiae yellow with black tips ; tarsal segments, ex- 

 cept base, black; coxae golden tomentose with yellow pile; most of the 

 bristles and spines on the legs yellow, the heavier spines at tips of tarsal 

 segments black ; wings yellowish hyaline ; costal cell and base of marginal 

 yellow. 



Female: Length 15 mm. Similar to the male. Basal black bands on ab- 

 dominal segments broader ; last two segments shining, the sixth black, the 

 seventh brown ; antennae black ; the golden hair on face reaching almost to 

 antennae. 



Holotype (No. 491), male, collected at Hood River, Sept. 

 24,1917 (F. R. Cole), and allotype (No. 492), female, from 

 Mackenzie Ridge, 6,000 feet, August 1, 1909 (Bridwell), in 

 Museum of the California Academy of Sciences. 



This species is very near C. pictitarsis Bigot, but the femora 

 are black and the median thoracic stripe is scarcely separated. 



