THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 201 



(fig. 142a) fully one and a half times as long as their tibiae, the first 

 two joints taken together being nearly as long as the tibia; first three 

 joints yellow, fourth whitish, fifth black; first joint a little longer 

 than the second and third together, third a little shorter than the 

 second, fourth about three-fourths as long as the third, a little com- 

 pressed and widened at tip, fifth nearly or quite as long as second, 

 much compressed and widened, somewhat oval in outline, still \\idest 

 near the tip, slightly more than one-half as wide as long. Middle 

 tarsi about one and a fourth times as long as their tibiae, black 

 from the tip of the first joint, which has a large bristle above. Hind 

 tarsi wholly black. Calypters, their cilia and the halteres yellow. 



Wings (fig. 142) grayish; costa with a small knotlike enlargement 

 at tip of first vein; last section of fourth vein a little bent some dis- 

 tance before its middle; hind margin of wing a little indented at tip 

 of fifth vein; anal angle prominent; tliird vein bent backward a little 

 at tip. 



Female. — Face wide, yellowish white; legs and feet as in the female 

 of splendidus; wing as in the male, the bend in the last section of 

 fourth vein being beyond basal third but some distance before the 

 middle. 



Redescribed from the type specimens and 5 males and several 

 females. The males were taken as follows: 2 in Polk County, Wis- 

 consin, by Baker, in July, in the Aldrich collection; I have a speci- 

 men from Bretton Woods, New Hampshire, taken by E. P. Van 

 Duzee; and I took 2 at Kearney, Ontario, July 5, 1909. 



Type locality .—White Mountains, New Hampshire, July. Melander 

 and Brues report it from Illinois and New Hampshire; C. W. Johnson 

 has several specimens from New England in his collection. 



Types. — ^In Museum of Comparative Zoology, Cambridge, Massa- 

 chusetts. 



Splendidus and splendidulus may be separated in the males by the 

 enlargement of the costa at tip of first vein. In splendidus it is elon- 

 gated, and in splendidulus it is smaller and knotlike; the fifth joint 

 of fore tarsi is also somewhat different in the two species, for in 

 the former it is about as long as the third joint and somewhat 

 triangular, while in splendidulus it is about as long as the second 

 joint and oval in outline; the cilia on lower edge of hind femora are 

 a little longer than the width of the femora in splendidus, while in the 

 other form it is scarcely as long as the width of the femora. 



No. 143. DOLICHOPUS NUDUS Loew. 



Dolichopus nudiis Loew, Mon. N. Amer. Dipt., pt. 2, 1864, p. 41. 



The following is copied from Doctor Loew's original description: 



Male. — Metallic-green, bright. Front metallic-green. Antennae black; the undei 

 side of the first joint yellowish-red; third joint rather blunt at the tip. Face ocher- 

 yellow; palpi yellow. Cilia of the inferior orbit pale yellowish. Hypopygium black ; 



