412 THE CANADIAN ENTOMOLOGIST 



represented only by dark brown margins, there being five such 

 narrow lines, of which the lateral ones are broadest; remainder of 

 the mesonotum grayish yellow, with numerous black setigerous 

 punctures. Pleura yellow, sparsely gray pruinose. Halteres 

 short, yellow, the knob, except at the tip, dark brown. Legs with 

 the coxa? and trochanters yellow; femora dull yellow, the tips in- 

 distinctly brown; tibiae brownish yellow; tarsi similar, the terminal 

 segments darker. Wings mottled with brownish gray and whitish ; 

 costal cell yellow; subcostal cell similar but even more intense r 

 stigma yellowish brown; membrane brownish gray, with darker 

 spots at the origin of the sector and along the cord; large whitish 

 areas along the cord extending from R through cell Cu^ to the 

 wing margin; a pale area beyond the stigma in cell 2nd R^ and the 

 base of R^; cell M ^ largely pale; two large, pale areas in the first 

 anal cell. Venation: R^ long, a little longer than the petiole of 

 cell M ^; cell 1st M ^ small, the punctiform m-cu inserted at about 

 one-third to one-fourth its length. 



Abdominal tergites brownish yellow, becoming darker near 

 the hypopygium; an indistinct, interrupted, brown sublateral 

 stripe; basal segments broadly ringed with silvery; sternites brown- 

 ish yellow. Male hypopygium rather large. Ninth tergite small, 

 deeply impressed dorso-medially to form two tumid halves; caudal 

 margin flattened, with a deep, V-shaped median notch, the adjacent 

 lobes subacute, reddish, each with a small, U-shaped lateral notch. 

 Ninth pleurite incomplete, the pleural suture deep, the dorsal 

 posterior margin of the pleurite produced dorsad into a flattened, 

 chitinized margin that is truncated apically; outer pleural ap- 

 pendage small, slender, cylindrical. Dorsal inner angle of the 

 ninth sternite with two pendulous, fleshy lobes hanging in the 

 notch of the sternite, these tumid and clothed with abundant 

 long, pale hairs; eighth sternite large, the caudal margin almost 

 straight medially, with a broad fringe of long yellow hairs; the 

 lateral lobes produced. 



Habitat. — Kansas. 



Holotype. — &, Lawrence, Douglas County, Kansas, June 4,, 

 1918. 

 Tipula alaska, new species. 



Antennae with the flagellum uniformly pale brown; meso- 



