482 PROCEEDINGS OF THE ACADEMY OF [Sept.,, 



gular lobe with a small lobule on the ventral outer edge, this 

 appendage pale and covered with a dense, pale pubescence; the 

 inner appendage is also pale and fleshy, arising from the apex of the 

 pleural region just inside the outer pleural appendage; this appendage 

 is darker colored, thicker, reddish yellow; from the notch between 

 the pleurite and the sternite arises a flattened, chitinized appendage. 

 Ninth sternite divided to the very base by a split which widens out 

 behind. Eighth sternite unarmed. 



Habitat.- — Arctic America. 



Holotj^pe, d^, Fort Resolution, Hudsons Bay Territory, Canada 

 (Kennicott) . 



The tj^pe is in the collection of the Museum of Comparative 

 Zoology where it bore the manuscript name of tetra in Loew's writing. 

 This species is dedicated to the intrepid Arctic explorer and collector, 

 Robert Kennicott. 



This species can be confused only with the more southern per- 

 longipes Johnson, from which it may be separated by the following 

 key: 



1. Antennae bicolorous; thorax pale yellow Avith three brown stripes, 

 the lateral pair less distinct than the median one; legs long 

 (male, fore leg, femur, 10 mm.; tibia, 11.8 mm.; middle leg, 

 femur, 11.3 mm.; tibia, 11.5 mm.); male hypopygium with the 

 median lobe of the ninth tergite entire or the bifid nature barely 

 indicated; outer pleural appendage long and narrow, narrowed 

 at both ;ends; ninth sternite extensive, deeply incised, the 

 • margins of the incision closely appressed forming a carinate 



ridge (Eastern United States) perlongipes Johnson.^ 



Antennae unicolorous or nearly so; thorax gray with a single 

 delicate brown line; legs short (male, fore leg, femur 7.3 mm.; 

 tibia, 9 mm.; middle leg, femur, 8.5 mm.; tibia, 8.8 mm.); 

 male hypopygium with the median lobe of the ninth tergite 

 bifid; outer pleural appendage broad, subrectangular; ninth 

 sternite deeply incised, the margins merely approximated, 

 not carinate (Arctic America) kennicotti sp. n. 



Tipula piliceps sp. n. 



Coloration blue-gray with brown markings; body with abundant 

 pale hair. 



Female. — Length, 14.5 mm.; wing, 16 mm. 



Frontal prolongation of the head dark bluish brown, the nasus 

 cUstinct. Palpi short, brownish l^lack. Antennae dark brownish 

 black. Head bluish gray with a Inroad brown median stripe. 



' perlongipes Johnson ; Proceedings of the Boston Society of Natural History, 

 vol. 34, No. 5, p. 131 ; 1909. 



