1915.] NATURAL SCIENCES OF PHILADELPHIA. 499 
portion of which is produced cephalad into a chitinized point which 
is deeply split by a notch; the upper point or lobule is a slender, 
chitinized, finger-like process, the lower lobule a rounded, chitinized 
ball; the posterior portion of this flattened lobe is produced into a 
chitinized point which is directed caudad and inward; the posterior 
margin and face of the appendage is densely provided with long 
coarse hair. Ninth sternite very extensive, almost continuous, 
but more membranaceous on the median line beneath; the caudal 
margin with a concave notch; on the sides of the notch, just ventrad 
of the pleurite, is a rounded knob which is densely provided with 
very long pale hair. Eighth sternite long, prominent, narrowed 
toward the apex whose caudal margin is gently concave and provided 
on either side of the median line with a tuft of long reddish hairs; 
ventral surface of the sclerite on the caudal half and along the margin 
with numerous stout, subappressed black hairs. 
The female is similar to the male; the antennae are shorter; 
ovipositor with the valves smooth, the tergal valves long, rather 
slender, rounded at the apex. 
Habitat. — Northwestern United States. 
Holotype, cf, Beaver Creek, Montana; altitude 6,300 feet; 
August, 1913 (S. J. Hunter). 
Allotype, 9 , topotypic. 
Paratypes, 5 d^'s, topotypic. 
The types are in the collection of the University of Kansas, para- 
types in the collection of the author. 
Tipula mandan sp. n. 
Coloration brownish gray; antennae rather elongated, the three 
basal segments yello'udsh, the flagellum black; head gray with a 
delicate median brown vitta; thorax grayish mth brown stripes; 
wings grayish hyaline \\ith a brown stigma; abdomen yellowish 
with three dark bro"UTi stripes, of which the lateral pair are interrupted ; 
male genitaha with the ninth tergite small, the caudal margin with 
a deep V-shaped notch; ninth pleurite produced caudad as a long 
spatulate point. 
Male. — Length, 10.3-10.5 mm.; wing, 9.5-10 mm. 
Female. — Length, 10.5 mm.; wing, 9-9.2 mm. 
Frontal prolongation of the head dull yellowish, the nasus distinct; 
palpi with the two basal segments dull brownish yellow, the terminal 
segments brown. Antennae with the two basal segments yellowish, 
the third segment bro^vnish yellow; the remaining segments dark 
brownish black, the segments elongated, slightly enlarged basally 
