TEE CANADIAN ENTOMOLOGIST 69 



which the sclerite is elevated into a transverse ridge. Eighth 

 sternite unarmed. 



The female is similar to the male but the wings are greatly 

 atrophied, the legs, especially the femora, incrassated and the 

 tibiae and tarsi shortened. The abdominal tergites are brown with 

 a broad, basal median area of black on each segment, the caudal 

 margins brighter; lateral margins of the segments pale yellowish, 

 sublaterally with a blackish band. Ovipositor of the arctica 

 type, the ends of the valves rather blunt, the dorsal edge with 

 four or five sharp teeth, the lateral margin with seven or eight 

 similar but larger teeth. 



Habitat. — Alaska. 



Holotype. — cf, Koyukuk R., Alaska; Lat. 67-69 N.; Long. 

 151 W. (VV. J. Peters). Summer of 1901. 



Allotopotype. — ^9. 



Types in the collection of the U. S. National Museum. 

 Tipula macrolaboides, sp. n. 



Macrolabis group ; related to T. "macrolabis Loew of North- 

 eastern North America but differing in the male hypopygium, the 

 pleural lobes unarmed at their tips; the ninth tergite with an 

 acute median lobe, the broad, lateral lobes deeply notched to 

 form two smaller lobes. 



Male. — Length 17-17 mm.; wing 17-18.6 mm. 



Close to macrolabis except as follows: 



Antenna? of the type light brown throughout, the paratype 

 uniform pale throughout. 



Praescutum light gray with four narrow, chestnut brown 

 stripes, the median one divided by a very broad ground vitta, 

 pointed anteriorly; lateral stripes shorter, continued back onto the 

 scutal lobes. 



Male hypopygium with the ninth tergite extensive, with a 

 broad and deep dorsal depression; produced caudad into a com- 

 pressed median blade with a sharp dorsal edge or carina; the 

 broad lateral lobes are deeply notched by a rounded incision to 

 form two smaller lobules on either side, the proximal lobule longest, 

 shiny, the lateral one with a sharp edge that is provided with a few 

 stout bristles. Ninth pleurite complete, the caudal ventral angle 

 produced caudad and slightly dorsad and proximad as a promi- 



