8 c Canadian Arctic Expedition, 1913-18 



r~m cross-vein connects with vein R h rather than with vein R A + 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 <?, Yakutat, Alaska, July 21, 1899; one <?, 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 <?, 9, Olympia, 

 Wash., March 16, 1896; one <?, Seattle, Wash.; one <?, Vancouver, B.C., March 

 29, 1902. 



Subfami'y TIPULINE. 



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 very Tipuline in nature, in some 

 respects uniting the Longurio and Tipula types. 



Stygeropis parrii (Kirby). 



Ctenophora parrii Kirby; Supplement to Capt. Parry's First Voyage; 1824. 



Male. — Length, 11-13 mm.; wing, 14-15 mm. 

 Female. — Length, 17-5 mm.; wing, 15-8 mm. 



Palpi short, black. Frontal prolongation of the head short, black. 

 Antennse (PI. II, fig. 12) black, the first segment elongate, transversely wrinkled; 

 flagellar segments narrow basally, enlarged distally into a blunt serration on 

 the inner face. Head dull black with a sparse yellowish grey bloom, the sides 

 of the vertex clothed with elongate, pale hairs. 



Thoracic dorsum light grey with three broad, darker grey stripes, the 

 median one broadest anteriorly; thoracic interspaces with an abundance of 

 long, erect hairs; an indistinct, narrow, blackish, median stripe runs the length 

 of the notum. Pleura grey, the dorso-pleural membrane more yellowish. 

 Halteres brown, the knobs darker. Legs with the coxae and trochanters dark, 

 the .former grey pruinose; femora reddish brown, the tips broadly blackened; 

 tibiae and tarsi black. Wings with a slight brownish grey tinge, the costal 

 and subcostal cells more brownish; stigma dark brown; obliterative streak 

 before the cord not very distinct; venation (PL I, fig. 7) R 2 + 3 long, very slightly 

 arcuated at origin; petiole of cell M x present but often greatly shortened as in 

 parrioides. 



Abdomen dark blue-grey, the segments very narrowly ringed with paler 

 on the caudal margin; lateral margins of the tergites broadly paler. Lobes of 

 the male hypopygium conspicuously yellow; female ovipositor with the tergal 

 valves rather high, narrowly blackened at their tips. Male hypopygium having 

 the ninth tergite (PL II, fig. 26) large, the caudal margin with 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 (PL II, fig. 23) 



