8 c Canadian Arctic Expedition, 1913-18 
r-m cross-vein connects with vein Rr, rather than with vein i?4 + 5 as in most 
species of the genus. 
It is a much smaller species than either exoloma or diaphana which have the 
wings measuring over 10 mm. I am inclined to believe that it is this species 
that Coquillett records as diaphana in the Harriman reports, from the following 
Alaskan localities: — 
Localities: One d", Yakutat, Alaska, Julv 21, 1899; one d", Berg bay, June 
10, 1899; one ^, Popof island, July 15, 1899". 
It may be that this represents a still undescribed species of the group. 
I have the following records for T. diaphana: — 
Localities: One 9, Pullman, Wash., May 4, 1898 type; five cf, 9,01ympia, 
Wash., March 16, 1896; one d", Seattle, Wash,; one cf, Vancouver, B.C., March 
29, 1902. 
Subfamiy TIPULIN^. 
Tribe T IP U LIN I. 
Genus Stygeropis Loew. 
Stygeropis Loew; Berliner Entomologische Zeitschrift, vol. 7, p. 298; 1863. 
A small genus of northern and Arctic Tipuline crane-flies, occurring in 
both hemispheres. The generally accepted belief that this genus is closely 
related to Ctenophora and its allies is entirely erroneous. This is best proved 
by a study of the immature stages which are ver}^ Tipuline in nature, in some 
respects uniting the Longurio and Tipula types. 
Stygeropis parrii (KirbjO- 
Ctenophora parrii Kirby; Supplement to Capt. Parry's First Voyage; 1824. 
Male. — Length, 11-13 mm.; "udng, 14-15 mm. 
Female. — Length, 17-5 mm.; wing, 15-8 mm. 
Palpi short, black. Frontal prolongation of the head short, black. 
Antennae (PI. II, fig. 12) black, the first segment elongate, transversely wrinkled; 
flagellar segments narrow basally, enlarged chstally into a blunt serration on 
the inner face. Head dull black "vvith a sparse yellowish grey bloom, the sides 
of the vertex clothed with elongate, pale hairs. 
Thoracic dorsum light gre}^ with three broad, darker grey stripes, the 
median one broadest anteriorly; thoracic interspaces with an abundance of 
long, erect hairs; an inchstinct, narrow, blackish, median stripe runs the length 
of the notum. Pleura grey, the dorso-pleural membrane more yello'wish. 
Halteres bro^\Ti, the knobs darker. Legs with the coxae and trochanters dark, 
the former grey pruinose; femora reddish bro^vn,'the tips broadly blackened; 
tibiae and tarsi black. Wings wdth a slight browmish grey tinge, the costal 
and subcostal cells more bro^Amish; stigma dark brown; obliterative streak 
before the cord not very distinct; venation (PI. I, fig. 7) R 2 + 3 long, very slightly 
arcuated at origin; petiole of cell Mi present but often greatly shortened as in 
pari^ioides. 
Abdomen dark blue-grey, the segments very narrowly ringed -uith paler 
on the caudal margin; lateral margins of the tergites broadly paler. Lobes of 
the male hypopygium conspicuously yellow; female ovipositor v^dth the tergal 
valves rather high, narrowly blackened at their tips. Male h^-popj'gium having 
the ninth tergite (PL II, fig. 26) large, the caudal margin vnth a very deep, 
U-shaped, median notch, the lateral lobes prominent, obliquely truncated; 
tergite black, the apices of the lobes broadly pale. Ninth pleurite rather exten- 
sive, the pleural suture indistinct beneath; outer pleural appendage (PI. II, fig. 23) 
