484 PROCEEDINGS OF THE ACADEMY OF [Sept., 



narrow; eighth tergitewith the margins flattened, conspicuously 

 expanded; tergal valves of the ovipositor long, pale (Hudsons 



Bay Territory) piliceps sp. n. 



Color of the thorax blue-gray with the stripes almost black, 

 broad, and the median pair tending to l3ecome confluent; 

 median vitta of the head distinct; dorsal abdominal vitta 

 broader, more diff"used; eighth tergite with the margins not 

 conspicuously expanded; tergal valves of the ovipositor 

 smaUer (Northern Greenland; Polaris Bay) besselsi 0. SJ 



Tipula imperfecta sp. n. 



Coloration grayish brown, the thoracic stripes indistinct; cell 

 1st Mi open by the atrophy of the medial cross-vein. 



Female. — Length about 11 mm.; wing, 10.5 mm. 



Frontal prolongation of the head rather short, yellowish brown. 

 Palpi brown. Antenna with the basal segments dull yellow, the 

 flagellum dark brown; antennae rather long for this sex. Head dull 

 gray with a narrow dark brown median vitta. 



Pronotum dark grayish brown, the scutellum more yellow on the 

 sides. Mesonotal praescutum dark grayish brown, the stripes in the 

 type specimens indistinct; scutellum a little paler. Pleura with 

 the mesopleurse rather clear gray, the posterior pleurites dull light 

 yellow. Halteres dull in color, the knobs darker brown. Legs 

 with the coxse dull yellow, suffused basally with grayish brown; 

 trochanters brownish yellow; femora dull yellow, broadly dark 

 brown at the apex; tibiae similar, narrowly dark brown at the apex; 

 tarsi brown. Wings light gray, the stigma yellowish brown; an 

 indistinct vitreous band before the stigma. Venation (see Plate 

 XVI, fig. 9). 



Abdominal tergites dull brownish yellow, the caudal margins of the 

 segments broadly pale; a broad dorso-median vitta consisting of 

 broad V-shaped triangles on each segment, interrupted by the pale 

 caudal margin to each segment; the apex of the triangle is in front; 

 indistinct brown sublateral bands and a broad pale margin to the 

 tergites; tergites seven to nine dark brown, excepting the narrow, 

 pale, caudal and lateral margins; sternites dull yellow with a broad 

 Ijrown median band which is clearer on the terminal segments. The 

 ovipositor has the ninth tergite (see Plate XXI, fig. 86) suddenly 

 narrowed into a cylindrical rectangular plate, the dorsal valves of 

 the ovipositor feebly chitinized, not serrated, lying transversely. 



Habitat. — Eastern Canada. 



''besselsi Osten Sacken ; Proceedings of the Boston Society of Natural History, 

 vol. 19, p. 42 ; 1876. 



