THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 183 



yellow with the tip black; fifth jomt as long as third, black, com- 

 pressed and widened, nearly oval. Middle tarsi nearl}^ as long as 

 their tibiae, yellow with the tips of the first three joints and the whole 

 of the last two black. Hind tarsi wholly black. Calypters and 

 halteres yellow, the former with black cilia. 



Wings (fig. 127) broad, grayish, sometimes the veins are very 

 slightly bordered with brownish; costa with a small knot-like enlarge- 

 ment at tip of first vein; last section of fourth vem moderately bent 

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

 tip of fifth vein ; anal angle prominent. 



Female. — Face wide, grayish white; antennae about as ui the male, 

 but sometimes the first jomt is black on upper edge of outer side; 

 fore tarsi a little longer than their tibiae, yellow, becommg darker 

 toward their tip, but only the last joint black, first four joints 

 slightly darker at their tips, basitarsi nearly as long as the three 

 following joints taken together, fourth joint two-thirds and fifth 

 nearly as long as third; middle tarsi as in the male, except that the 

 yellow at base of second and third joints is less conspicuous; hiad 

 tibiae only slightly brownish at tip and without the brown streaks 

 on mner surface; hmd margin of wing a little more evenly rounded 

 than in the male, the anal angle bemg more romided and the wing 

 wider between the fifth and sixth veins. 



Redescribed from 10 males and 2 females taken as follows: Woods 

 Hole, Massachusetts; Horse Neck, Beach, Massachusetts (Hough); 

 Cohasset, Massachusetts, July 22-September 8; Machias, Maine, July 

 17; Bufi^alo, New York, Jmie 27. 



Type locality. — Canada. Type locality for Tienshawi .Wheeler is 

 Massachusetts. Johnson, Insects of New Jersey, reports it from Cape 

 May, June 23. 



Type. — In Museum of Comparative Zoology, Cambridge, Massa- 

 chusetts. 



No. 128. DOLICHOPUS PLUMIPES ScopoU. 



Musca plumipes Scopoli, Entomologia Carniolica, 1763, p. 334. 



Dolichopus pennitarsis Fallen, Dolichopodes, 1823, p. 6. — Stannius, Isis, 1831, 



p. 63. — Zetterstedt, Dipt. Scand., vol. 2, p. 541, 1843. 

 Dolichopus plumipes Loew, Mon. N. A. Dipt., vol. 2, 1864, p. 60. — Aldrich, 



Kansas Univ. Quart., vol. 2, 1893, p. 13. — Coquillett, Proc. Wash. Acad. 



Sci., vol. 2, 1900, p. 423.— LuNDBECK, Diptera Danica, vol. 4, 1913, p. 99. 

 Hygroceleulhus plumipes Melander and Brues, Biol. Bull., vol. 1, 1900, p. 127, 



fig. 3. 



Male. — Length, 3. 5-4. .5 mm.; of wing 3.5-4 mm. Face rather 

 narrow, long, reaching nearly to the lower corner of the eyes, pale 

 yellow to ocher yellow. Front shining green. First two joints of 

 the antennae yellow, third black, usually more or less yellow at 



