Crane-flies 13 c 
Tipula arctica Curtis. 
Tipiila arctica Curtis; Description of the insects brought home by Commander J. Clark 
Ross. Appendix to Ross's Voyage to the Arctic regions, p. Ixxvii, Plate A, fig. 15; 1831. 
Male. — Length, 13-17 mm.; wing, 13 -5-17 -5 mm. 
Female. — -Length, 20-21-5 mm.; wing, 16-17 mm. 
Palpi dark brown. Frontal prolongation of the head rather elongate, 
blue-grey; nasus stout. Antennae (PI. II, fig. 17) deeply serrate, each segment 
of the flagellum deeply incised beneath, the apical enlargement being only a little 
smaller than the basal swelHng but not provided with verticils. Head blue- 
grey. 
Mesonotal praescutum dull grey with three broad blue-grey stripes, the 
mechan one often narrowly spHt by a vitta of the ground-colour; these stripes 
are sometimes narrowly margined with brown; the thoracic interspaces with 
numerous black setigerous punctures; remainder of the thorax blue-grey includ- 
ing the coxse of the legs. Halteres brown, the knobs darker. Legs with the 
femora redchsh yellow broadly tipped with dark brown; tarsi dark brown. 
Wings subhyaline with conspicuous brown and grey marldngs, cells C and Sc 
a httle more yellowish; a small brown spot at the origin of Rs; stigma large, 
sending a cloud down the cord to cell first AU; greyish brown clouds in the anal 
cells, at the base of cell Cu, at midlength and at the end of M and in the apex 
of the wings; venation (PI. I, fig. 10). 
Abdominal tergites in the male with segment one, black; two to four, reddish 
yellow with broad sublateral stripes and an indistinct median stripe brownish 
grey; remaining segments dark brownish grey; sternites two to four, reddish 
yellow, broadly darkened laterally; terminal sternites brownish grey; the 
segments of the abdomen are very narrowly and indistinctly margined with paler. 
Male hypopygium with the ninth tergite (PL III, fig. 35) small with a deep and 
broad rounded caudal notch, the dorsum rounded into a saucer, the lateral 
lobes with four or five blunt teeth. The inner pleural appendage is illustrated 
(Plate III, fig. 37). 
The female is similar to the male in most respects, but the abdomen is 
differently coloured being dull grey with a broad, dark brown, interrupted, dorso- 
median stripe; the basal tergites a httle brightened on either side of the dorso- 
median fine; abdomen not excessively elongated as in the related T. longi- 
ventris; dorsal shield jet-black, shiny; tergal valves of the ovipositor brownish 
Ijlack. The ovipositor (PI. Ill, fig. 43) has the dorsal shield elongate, a little 
longer than the tergal valves of the ovipositor; these tergal valves have about 
fifteen teeth along the outer lateral margin; the sternal valves are very reduced 
as in this group of species, acicular, the pair forming a sublyriform organ (PI. Ill, 
fig. 40). ■ 
This was the most abundantly represented species in the collection including 
nearly one-half of the material, as follows: — • 
Localities: West of Konganevik, Camden bay, Alaska, July 4, 1914 (F. 
Johansen). Four cf's, Nos. 196-199. Port Epworth, mouth of Tree river. 
Coronation gulf, Arctic Canada, July 16, 1915 (J. J. O'Neill). Two c^'s, Nos. 102 
and 104; one 9, No. 103. Bernard harbour, Northwest Territories, June 21, 
1915, one cf, No. 1328; July 4, 1915, one 9, No. 1076; July 7, 1915, one d^, 
one 9, Nos. 1233, 1234; July 12, 1915, two 9, Nos. 756, 789, one ^, No. 757; 
July 19, 1915, <f, 9, Nos. 1266, 1267; July 22, 1915, c^, 9, Nos. 1062, 1063; 
July-August, 1915, six d', 9, Nos. 829-834; July 1-14, 1916, seven <^, 9, Nos. 
420, 421, 424, 426, 427, 428, and 430. 
Unless stated otherwise the material was taken by Mr. Johansen. Pupae 
are pinned with Nos. 197, 199, and 834. 
The immature stages of this interesting crane-fly will be considered on 
pages 18 and 19, under the second part of the report, on the immature stages. 
