124 CONTEIBUTIONS TO CANADIAN PALEONTOLOGY 



simple posterior branch by melans of an oblique cross-vein, so that 

 the typical irregularly pentagonal cell results. With its anterior 

 branch — ^which is bent almost at right angles — the long, nearly sig- 

 moid cubitus comes in contact witli the posterior branch of the 

 media, and with its own posterior bi<anch extends close to the first 

 anal vein. The normal opaque spot in the radial region is very 

 large, knd other more opaque places appear to have been present in 

 the medial and cubital regions. 



Of the species of Tipula from Florissant made loiown by Scudder, 

 T. maclurei and T. tartari approach the nearest to similar marking; 

 yet the correspondence is not so close that an identification couM be 

 attempted. 



In addition to the foregoing species, there is in the collection an 

 indeterminable tipulid from Tulameen river. 



Asilidx : — 



In 1879, a form belonging to this family was cited by Scudder 

 from British Columbia, but was not characterized. 



EmpidcB : — 



Microphorus defunctus, sp. nov. Figs. 32 and 33. 



Locality: Tulameen river, opposite Vermilion cliff — (August 6, 

 1906. L.M.L.). 



A very small form, the body of which is scarcely more than 4""° 

 in length, with wings 4™™ long, the breadth and length being in the 

 proportion of 1 : 2-3. The neuration can be made out only with great 

 difficulty, but with the exception of the cubitus, which is not yet so 

 strongly reduced, it appears to be rather similar to that of recent 

 species of Microphorus. 



The radius stretches about three-fourths the length of the wing; 

 its sector arises very near the base, and just below its origin sepa- 

 rateb into two characteristic nearly straight branches. The media 

 bifurcates approximately at the same distance as the sector; its 

 anterior branch t.ak€s a nearly straight course, while the posterior 

 branch slopes obliquely downward to unite with the anterior branch 

 of the cubitus, then separating from the latter it proceeds obliquely 

 toward the anterior branch of the meldia, with which it is connected 

 by a cross-vein, finally bending at an obtuse angle toward the apical 

 border. Thus is formed the characteristic medial cell, which extends 

 two-fifths the length of the wing, is irregularly pentagonal, and 



