THE CANADIAN ENTOMOLOGIST 



329 



TWO NEW TIPULIDvE FROM NORTHERN ALBERTA. 



BY W. G. DIETZ, M.D., HAZLETON, PA. 



Among a small collection of Tipulidae, collected in the Atha- 

 basca country in Northern Alberta, Canada, and sent me by Dr. 

 C. Gordon Hewitt, Dominion Entomologist of Canada, for de- 

 termination, are two species new to science, the description of 

 which herewith follows. I wish to state that the types of all are in 

 the Entomological Collection of the National Museum at Ottawa, 

 Canada. 



Limnobia gracilis, sp. n. (Fig. 27) 



Wings spotted; marginal cross-vein at tip of first longitudinal 

 vein, the fuscous spot at this point suboval. Halteres pale; 

 knob dark fuscous, pale at apex; femora with two brOwn bands 

 before the apex. 



Fig. 27. Limdobia gracilis, wing. 



Male — Length of body 8.5 mm., of wings 9.5 mm. * .' <\ 



Legs — Middle leg: femur 7 mm., t bia 6 mm., tarsus 5.5 mm.; 

 Posterior leg: femur 7.5 mm., tibia 7.5 mm., tarsus 6 mm. 



Head fuscous, rostrum dark brown, shining above; palpi 

 slender, fuscous, third joint yellowish, the second joint shorter 

 than the others. Antennae short, not reaching the anterior margin 

 of the mesonotum, joints one and two yellowish, stout, the former 

 longer than the latter; fiagellum very slender, joints elongate, 

 each with a few very long and some short hairs, but without whorls. 

 Head above and beneath beset with short, anteclinal blackish 

 hair. Occiput somewhat shining and more grayish posteriorly; 

 orbits edged with pale yellow. Eyes large, rather narrowly 

 separated above and almost contiguous beneath. 



October, 1915. 



