14 c Canadian Arctic Expedition, 1913-18 



Most species of the genus Tipula hold the wings outspread or divaricate in 

 a position of rest. Apparently but few hold them folded incumbent over the 

 abdomen. Two excellent photographs by Mr. G. H. Wilkins, taken at Bernard 

 harbour in .Inly, 1915, show that T. arctica falls in this latter group of species. 

 These illustrations show the female fly crawling about over the Arctic vegeta- 

 tion, possibly searching for a place in which to oviposit. (Plate VI). 



Tipula hewitti, n. sp. 



General colouration grey; mesonotal praescutum with three broad brown 

 stripes; halteres tipped with yellowish orange; legs with the femora dull brownish 

 yellow, broadly tipped with dark brown; wings very indistinctly marked with 

 greyish clouds; male hypopygium with the ninth tergite very narrowly notched 

 medially, the lateral lobes almost contiguous. 



MALE. Length, 13 mm.; wing, 15 mm. 



Palpi black. Frontal prolongation of the head short, dark grey; nasus 

 broad, prominent. Antennae black, the first segment of the scape dusted with 

 grey; flagelhim broken. Head grey, the disk of the vertex more brownish; 

 vertex produced cephalad between the antennal bases into a flat tongue that is 

 deeply split by a median groove. 



Mesonotum grey, the prsescutum with three dark brown stripes, the middle 

 one very broad in front, rapidly narrowed to near the suture, indistinctly split 

 by a grey median vitta; lobes of the scutum with a linear brown line. Pleura 

 grey, the dorso-pleural membrane dull brownish. Halteres brownish yellow, 

 the knobs dark brown tipped with dull yellowish orange. Legs with the coxae 

 grey; t rochanters dark brown; femora dull yellow, the tips broadly dark brown; 

 tibia' and tarsi dark brown. Wings dull grey; the costal and subcostal cells 

 more yellowish; stigma brown; a yellowish spot beyond the stigma in cell second 

 R\; indistinct grey clouds along vein Cu; venation: petiole of cell MI short; 

 crossvein m-cii obliterated by the fusion of Cu\ on Ms+4. 



Abdomen dark greyish black, the terminal tergites ringed with paler, 

 the lateral margins indistinctly paler. Male hypopygium with the ninth 

 tergite (PI. Ill, fig. 36) large, subquadrate, the caudal margin nearly transverse 

 with a very narrow median notch, the adjacent lobes slightly produced caudally 

 at their inner angle and almost touching one another. Ninth pleurite complete; 

 outer pleura! appendage (PI. Ill, fig. 30) elongate-oval, the apex broadly 

 rounded, the basal two-thirds dusky, the apical third yellowish. Ninth sternitc 

 with a deep median notch. 



Locality; Holotype, tf, Bernard harbour, Northwest Territories, July 1-14, 

 1916 (F. Johansen). No. 418. 



I take great pleasure in dedicating this species to Dr. C. Gordon Hewitt, 

 the Dominion Entomologist, to whom I am indebted for many favours. 



Tipula subpolaris, n. sp. 



MALI;. Length, 13-5 mm.; wing, 13-0 mm. 



In most respects very similar to T. hewitti, but the male hypopygium is 

 quite different. Unfortunately the type is badly discoloured. The antennae 

 f PI. II, fig. 18) have the flagellum black, the individual segments moderately 

 elongated, the basal enlargement being about half as long as the rest of the 

 segment. Tibial spurs long and slender. Basal abdominal tergites with 

 indications of orange on the sides of the median black line. Male hypopygium 

 with the ninth tergite (PI. Ill, fig. 38) black, the caudal margin with a broad 

 I'-shaped notch. Ninth pleurite complete, black, broadly margined with 

 yellowish; outer pleural appendage subelongate, narrowed toward the apex,. 

 dusky basally, passing into rather bright yellow beyond. 



