THE DIPTEKOUS GENUS DOLICHOPUS IN NORTH AMERICA. 99 



slightly indented at tip of fifth vein, rather evenly rounded; anal 

 angle rather prominent. 



Female. — Face nearly as broad as the front, white, a little silvery; 

 front a beautiful violet, narrowly edged with green along the orbits; 

 legs and tarsi black with knees, trochanters, fore and middle tibiae 

 and base of fore tarsi yellowish; wings strongly tinged with brown in 

 front of fourth vein and along the cross-vein. 



Described from 1 pair from Lewis ton, New York, May 31; 1 female 

 from Golden, New York, May 31; 1 female from East Aurora, New 

 York, May 24; 1 female from Hamburg, New York, June 6; 1 male 

 from Framingham, Massachusetts, May 28; and 1 male from Ocean 

 County, New Jersey. 



Typ^.— Male, Cat. No. 23004, U.S.N.M., from Lewiston, New York. 



No. 56. DOLICHOPUS CALIFORNICUS, new species. 



Male. — Length 5 mm.; of wing the same. Face rather wide, its 

 sides nearly parallel, rounded below, reaching down to the lower 

 corner of the eyes, silvery white. Front shining green. Antennae 

 black with a large yellowish lobe on lower inner corner of first joint; 

 second joint a little yellowish on inner side; third joint about as long 

 as wide, pointed at tip; arista longer than the antennae, inserted a 

 little above the point of the third joint. L^pper orbital cilia black, 

 lateral and inferior cilia silvery white, becoming flattened and very 

 conspicuous below. 



Thorax dark green, sometimes more blue, with a little white pollen 

 along the anterior edge of the dorsum; pleurae dulled with M^hite 

 pollen. Abdomen green with coppery reflections on the hind margins 

 of the segments, incisures blackish, sides of segments with spots of 

 white pollen. Hypopygium black; its lamellae (fig. 56a) rather 

 large, somewhat oval in outline, whitish with black border, jagged 

 and bristly on apical margin, otherwise fringed with rather long 

 hairs. 



Coxae black; anterior pair with yellow tips, the front surface nearly 

 bare with a few black hairs along inner edge, and covered with white 

 pollen. Anterior femora black with the apical third yellow. Middle 

 femora black at base, sometimes for nearly half their length, yellow 

 apically, with one preapical bristle. Hind femora black on basal 

 half or more above, on the lower edge the yellow sometimes extends 

 nearly to the base, fringed on upper outer edge with long bristle-like 

 hairs which increase in length and size and end in the usual preapical 

 bristle. Fore and middle tibiae yellow. Hind tibiae black, thick- 

 ened, a little fusiform, with a glabrous stripe above between the rows 

 of large bristles. All femora and tibiae with more or less white 

 pollen. Fore tarsi about as long as their tibiae, very slightl}^ com- 



