138 MELANDER AND BRUES. [Vol. 1. 



middle tibiae yellow ; hind tibiae black at tip, slightly swollen along middle, 

 but without a smooth space internally. Wings subquadrate, hyaline, third 

 and fourth veins subparallel at tip. Wings with costa at tip of first vein 

 thickened and without an obvious notch at terminus of fifth vein ; anal 

 angle rounded. Tegulae and halteres yellow. Tegular cilia black. 



One specimen, collected by Dr. Wm. M. Wheeler at Chicago, 

 III, dated May 8, 1896. 



This species is allied to laticornis Loew, and incongnins 

 Wheeler, but is at once distinct in the structure of the 

 antennae. 



In his table of Dolichopus} Mr. Aldrich commits incongnins 

 to the section with the femora yellow. The type specimen 

 has dark legs. Division 5 of his table may be thus altered : 



5. Third joint of antennae large ....... 5^: 



Third joint as usual, tegular cilia black ..... 6 



la. Tegular cilia yellow ; hind tibiae dark on whole under surface 



incongrnus Wheeler 

 Tibiae of hind legs infuscated towards tip . . . . 5^ 



lb. Tegular cilia generally yellow ; lamellae of hypopygium clear 



laticornis Loew 

 Tegular cilia black ; lamellae of hypopygium dusky 



intentus no v. 



Dolichopus calainus, sp. nov. 



Femora chiefly black, cilia of inferior orbit pale, middle tibiae black, 

 femora yellow only at extreme tip, hind femora not ciliated, legs wholly 

 black. 



Male. Length 5 mm., of wing 4.5 mm. Bright metallic blue with 

 greenish reflections. Proboscis and palpi piceous. Face of usual length 

 and rather narrow ; light gray below, ochreous and darker above. Antennae 

 totally black, third joint ovate, obtusely pointed at tip. Arista black, mod- 

 erately pubescent, nearly twice as long as the antenna and inserted about 

 the middle of the third joint. First joint but slightly bristly above, more 

 strongly so toward the tip. Front bright blue with a decided greenish 

 tinge. Postocular cilia black above, below the middle light. Just before 

 the lower corner of the eye they are suddenly somewhat longer and placed 

 very close together, forming a sort of brush. Dorsum of thorax and scutel- 

 lum deep shining blue, greenish only at extreme sides and in front. Abdo- 

 men much compressed toward the apex ; shining bluish-green, whitish dusted 

 on the sides below and covered with black hairs, which grow longer toward 

 the apex of the abdomen. Hypopygium piceous, with several conspicuous 



1 A'an. Univ. Quart. Vol. ii., No. i, p. 2. 



