202 The Ohio Journal of Science [Vol. XX, No. 6, 



This interesting fly belongs to the group of T. pribilofensis 

 Alexander, T. subarctica Alexander and other species; the 

 structure of the ovipositor is very different from the other 

 members of the arctica group, in which the tergal valves are 

 flattened, with the outer margin serrate. It is possible that 

 this fly is the female of the paratype specimen of T. subarctica 

 from this region (see Report Canadian Arctic Expedition, 

 Vol. Ill, part C, p. 16c; 1919) but it now seems probable that 

 this paratype is not conspecific with the holotype from Camden 

 Bay, Alaska. 



Tipula subarctica Alexander. 



1919 Tipida subarctica Alexander; Rept, Canadian Arctic Exped., 1913-18, Vol. 

 3C, pp. loc, 16c. 



A paratype of this species was taken at Katmai in July, 

 1917; a second male from Savonoski, Naknek Lake, June, 1919 

 (Jas. S. Hine). As remarked under the discussion of the pre- 

 ceding species, this male may belong to Tipula tcenigaster. 



Tipula katmaiensis, sp. n. 



Nasus lacking; antenna with the scape reddish brown, flagellum 

 black, the segments short, binodose; mesonotal prasscutum brownish 

 gray with two indistinct brown stripes; wings with a rather strong 

 brownish yellow tinge, stigma brown; abdomen reddish with a black 

 dorso-median stripe; hypopygium simple. 



Male. — Length about 11 mm.; wing, 12 mm. 



Frontal prolongation of the head dark brown, dusted with yellowish 

 gray; nasus lacking; palpi bro^\Tiish black. Antennae with the scapal 

 segments reddish brown, the first segment slightly darkened at the 

 base; flagellar segments black, the intermediate segments short but 

 with the inner face strongly constricted at mid-length, the basal swelling 

 being but little thicker and a little shorter than the distal portion of the 

 segment; outer flagellar segments cylindrical and crowded, the apical 

 segment minute. Head yellowish gray with a moderately conspicuous, 

 capillary, brown, median line; vertical tubercle of moderate size, entire; 

 eyes small. 



Mesonotal praescutum obscure brownish gray with two indistinct 

 brown stripes, the lateral stripes obliterated, the stripes submedian in 

 position, separated by a narrow line of the ground color; remainder 

 of the mesonotum brownish gray. Pleura brownish gray. Halteres 

 yellow, the knobs brown. Legs with the cox^ rather large, gray; tro- 

 chanters yellowish brown; femora and tibiae reddish yellow, the tips 

 narrowly dark brown; metatarsi pale brown, the tips and the remainder 

 of the tarsi dark brown. Wings strongly brownish yellow, the stigma 

 brown; veins dark brown, Sc and R more reddish brown. Venation: 

 cell 1st M2 small but high; m short; cell Mi about twice the length of 

 its petiole. 



