THE DIPTEROUS GEFUS DOLICHOPUS IN NORTH AMERICA. 275 



and in the form of the fore tarsi; the variety distinctus (fig. 201) has 

 the second joint two-thirds as long as first, third three-fourths as long 

 as second and a little shorter than fourth and fifth taken together, 

 fourth and fifth of nearly equal length, and taken together about equal 

 to second in length, being much shorter than first; while funditor 

 (fig. 200a) has the second three-fourths as long as first, third two- 

 thirds as long as second and about equal to the fifth in length and 

 nearly as long as first, the fourth being shorter. The fourth is more 

 compressed and widened in funditor than in distinctus. 



These differences are not very conspicuous and may prove to be 

 variable when more material is found, but for the present I think this 

 form should be considered as a distinct variety oi funditor, as it will 

 be better to make this a synonym than to separate the two if they 

 prove to be distinct. 



Described from 2 males, 1 taken at Opelousas, Louisiana (Pilate, 

 from Hough through Aldrich), and 1 at Merchantville, New Jersey 

 (C. W. Johnson), June 28. 



Type. — Male, Cat. No. 23058, U.S.N.M., from Opelousas, Louisiana. 



No. 202. DOLICHOPUS WILLISTONII Aldrich. 



Dolichopus luillistonii Aldrich, Kansas Univ. Quart., vol. 2, 1893, p. 22, pi. 1, 

 fig. 23. 



Male. — Length 4.5-6 mm.; of wing 5-5.5 mm. Face quite wide, 

 narrower and silvery white below, more yellowish gray above. 

 Front shining green with blue or bronze reflections, sometimes mostly 

 violet. Antennae yellow; third joint slightly darkened at tip, about 

 as long as wide, pointed. Proboscis yellowish brown; palpi browTi. 

 Lateral and inferior orbital cilia whitish, three or four of the upper 

 ^ilia on each side black. 



Thorax green, usually with bronze or coppery reflections, some- 

 times mostly violet; dorsum with yellowish gray pollen, which is more 

 abundant along the front; pleurae dulled with white pollen. Abdo- 

 men green with coppery reflections; the white pollen on its sides 

 abundant. Hypopygium black with green reflections on the basal 

 portion; its lamellae of moderate size, somewhat triangular in outline, 

 but rounded at tip, longer than wide, whitish with rather wide black 

 border on apical margin, jagged and bristly at upper apical corner, 

 otherwise fringed on the apical margin with black hairs, lower edge 

 with a few white hairs. 



Coxae yellow; middle pair with two blackish spots on outer sur- 

 face; fore coxae have on their anterior surface minute yellow hairs, 

 except along the inner edge and near the apex where the hairs are 

 black. Femora and tibiae yellow. Middle and hind femora each 

 with one preapical bristle, the latter with only very minute yellow 

 hairs on lower inner edge. Middle tibiae wnth three large bristles 

 below, two near apical and one near basal third, their basitarsi with 



