DIPTEEA— ASILID^. 565 



(which is scarcely as long as the small transverse vein) with the upper apical 

 branch of the fifth longitudinal vein just beyond its forking, or opposite the 

 forking of the third longitudinal vein ; the fifth longitudinal vein forks pre- 

 viously to this, emitting a branch barely before the point where the ante- 

 rior basal transverse vein stinkes it, so that the branch almost appears to be 

 a continuation of the transverse vein ; and previous to this it has a distinct 

 angle, where another vein is thrown off at right angles, directly opposite 

 the upper extremity of the anterior basal transverse vein, and beyond the 

 origin of the third longitudinal vein ; the basal half only of the sixth longi- 

 tudinal vein can be seen, but its direction shows that it unites with the 

 lowest branch of the fifth at its apex, as in Dasypogon. All the cells 

 throughout the wing are exceedingly narrow. 



Length of wing, 6.75°"°; probable breadth, 1.6°"". 



Green River, Wyoming. One specimen, No. 4143 (S. H. Scudder). 



Stenocinclis sp. 



PL 10, Pig. 15. 



Certainly to this family, not improbably to this genus, and perhaps to 

 the single species described above, belongs the body of a fly figured on PI. 

 10, Fig. 15. It is a male. The thorax is very stout, naked, and devoid of 

 bristles. The femora stout, inflated, naked, and spineless ; the tibiae not 

 one-third so stout, cylindrical, hairy, and apparently spinous, not so long 

 as the femora ; the tarsi densely hairy and spinous, the claws stout, strongly 

 curved. The thorax and abdomen, the former more distinctly, show a 

 microscopic longitudinal wavy carding of the integument, which is also 

 faintly seen on the naked femora. 



Length of body, 9.5""' ; of femora, 2°"" ; breadth of latter, 0.7°"°. 



Green Hiver, Wyoming. One specimen, No. 45 (Prof. L. A. Lee). 



AsiLiD^ sp. 



A fly, apparently of this family, but in too imperfect a state for any 

 reasonable identification at present, was found by Dr. G. M. Dawson three 

 miles up the North Fork of the Similkameen River, British Columbia, and 

 numbered by him 67 and 68. 



