235 
cell rather elongate. Preefurca of normal length. Petiole of sec- 
ond posterior cell relatively short, not more, generally much less, 
than half as long as the discal cell ; fifth posterior cell usually much 
broader at base than at margin. Discal cell relatively long and 
narrow, at least twice as long as broad. Sixth longitudinal vein 
pretty closely approximated to the fifth ; seventh longitudinal vein 
much less than half as long as the wing. Legs slender, the femora 
only a little more than half as long as the wings, andscarcely stouter 
than the tibize, which barely exceed them in length. Abdomen 
with moderately broad and similar mediodorsal and lateral dark 
stripes. 
Length of wings, 16-19 mm.; of legs in a specimen of largest 
size: femora, to mm. ; fore and mid tibiz, 10.5 mm. ; hind tibiz, 
10.3 mm. 
Florissant, Colorado. Twelve specimens, of which two are <, 
one indeterminate, the remainder @ ; Nos. 1611, 1892, 2839, 5206, 
5544, 5584, 7786, 8166, 8170, 8479, 13759 of my collection; No. 
1.788 of the Princeton collection. 
Tipula internecata. 
Wings nearly four and a half times longer than broad, the stigma 
rather small and followed below by a dark fuliginous patch, as in 
the preceding species, the veins discolored along their edges, and 
occasionally, and especially at and beyond the middle of the fourth 
longitudinal vein, enlarging into discolored cloudy patches sepa- 
rated by the faintest possible pallid cloud ; similar pallid clouds oc- 
cupy the discal and fifth posterior cells. Auxiliary vein attaining 
the middle of the inner marginal cell; poststigmatal cross vein 
transverse, moderately brief; trapezoidal cell not much elongated. 
Preefurca of normal length. Petiole of second posterior cell less 
than half the length of the discal cell; fifth posterior cell much 
broader at base than on margin. Discal cell of medium size, fully 
twice as long as broad. Sixth longitudinal vein moderately ap- 
proximated to the fifth; seventh longitudinal vein less than half as 
long as the wing. Legs slender, the femora but little stouter than 
the tibize, the middle pair, intermediate in length as in position, 
about three fifths the length of the wing; tibiz scarcely longer 
than their respective femora, the tarsi unusually short, being only a 
little longer than the tibiz. Abdomen dark above and light 
below. 
