330 THE CANADIAN ENTOMOLOGIST 



Thorax above sordid yellow, prolonged into a long slender 

 neck with a brown line each side of median line. Collare some- 

 what infuscate at middle. Mesonotum with fou~ dark fuscous 

 stripes, the median pair reaching from the transverse suture to 

 the anterior margin and narrowly separated by a yellowish line; 

 the lateral stripes abbreviated anteriorly. Pleura yellowish 

 fuscous, with a silvery sheen. Legs sordid yellow; femora with 

 two fuscous bands before the apex, separated by a pale band ; 

 tibiae slightly infuscate towards the apex; outer tarsal joints fuscous; 

 the entire leg, except the coxae, beset with shbrt, black pubescence. 



Wings moderately wide, grayish, marked with four fuscous 

 spots near the costal margin and nebulosities along the posterio- 

 apical margin, as follows: A rounded spot at base of first basal cell; 

 a trapezoidal spot at beginning of praefurca, extending from the 

 first longitudinal vein, but not quite attaining the fourth longi- 

 tudinal vein; a large subquadrate spot at end of subcostal vein; a 

 suboval spot at end of first vein ; transverse veins in apical part of 

 wing edged with fuscous. A nebulous fascia extends across the 

 apical part of the wing and within the wing margin into the fifth 

 posterior cell ; a nebulous patch at end of vein six and another large 

 one in the axillary cells. The space between the third and fourth 

 costal spots is yellowish. The marginal cross-vein is at the apex 

 of vein one; the subcostal vein ends somewhat anterior to the 

 proximate end of the' submarginal cell, and its cross-vein runs 

 obliquely with vein one. Halteres pale; knob dark fuscous, its 

 apex pale. 



Abdomen somewhat shining; first tergite fuscous, yellow at 

 the sides; tergites 2-4 yellow, banded with fuscous posteriorly; 

 fifth tergite yellowish fuscous, tergites 6-8 fuscous; underside 

 similar to the upper. The whole abdomen clothed with short, 

 pale pubescence. Hypopygium ferruginous, pleural lobes large, 

 appendages recurved, beaklike, acute. 



Holotype — Tsolinoi Lake — about five miles north of Athabasca 

 Lake. July 5th, 1914.— F. Harper. 



Its nearest ally is L. cinctipes Say, from which it differs by 

 its smaller size and the fuscous spot at end of vein one is not circular 

 as in that species. It resembles somewhat in coloration L. call- 



