237 
middle of the inner marginal cell ; poststigmatal cross vein trans- 
verse, of moderate length; trapezoidal cell not very long. Pre- 
furca distinctly shorter than the width of the first and second basal 
cells next its base. Petiole of second posterior cell not half, gener- 
ally not nearly half, so long as the discal cell; fifth posterior cell 
somewhat wider at base than at margin. Discal cell rather small, 
about twice as long as broad. Sixth longitudinal vein moderately 
distant from the fifth; seventh longitudinal vein scarcely half as 
long as the wing. Legs slightly less slender than usual, the tibize 
distinctly slenderer than the femora, the latter about two thirds 
as long as the wings, the other members not sufficiently preserved 
in any specimen for measurement. Abdomen pale, with dark longi- 
tudinal median and lateral stripes, the latter less distinct and all 
sometimes obliterated. 
Length of wings, 15.5-16.5 mm; fore femora, 8.5 mm.; mid 
femora, 9 mm. ; hind femora, 1o mm. 
Florissant, Colorado. Five specimens, two 6’, three 2 ; Nos. 
402, 3146, 4773, IIT12, 13754. . 
Tipula lapillescens. 
JEL Ch pater Sy 
Wings from three and a half to four times as long as broad, the 
stigma small, distinct, rounded, lying opposite the basal half of the dis- 
cal cell, followed by a fuliginous stain in the outer half of the marginal 
cell, and accompanied by a slender but more or less distinct infusca- 
tion of the fifth and seventh longitudinal veins, and sometimes of 
all or nearly all the veins of the apical fourth of the wing; there 
is also sometimes a faint cloud in the middle of the basal cells. 
Auxiliary vein terminating a very little before the middle of the 
inner marginal cell; poststigmatal cross vein slightly oblique, 
moderately long; trapezoidal cell moderately short. Preefurca 
very distinctly shorter than the first and second basal cells next its 
base. Petiole of second posterior cell about half as long as the 
discal cell ; fifth posterior cell considerably broader at base than 
at margin. Discal cell rather small, about twice as long as broad. 
Sixth longitudinal vein pretty closely approximated to the fifth ; 
seventh longitudinal vein nearly or quite half as long-as the wing. 
Legs very slender and long, the femora almost two thirds as long 
as the wings, the tibiz distinctly longer than they, and the tarsi 
