22 THE CANADIAN ENTOMOLOGIST. 



counting the vertical), which extend to the base of the third anten- 

 nal joint; frontal stripe half as wide as parafrontal, reddish brown; 

 parafrontal with a few small hairs; first and second antennal 

 joints red, the third black, four times as long" as second, reaching 

 almost to oral margin, the arista with short penultimate joint, 

 the last thickened almost to middle; parafacials silvery, more 

 yellow abo\e, bare, less than half as wide as the facial depression; 

 facial ridged with a row of 7 coarse bristles, ascending above 

 middle; \ibrissa' at oral margin; palpi yellow, rather stout; eyes 

 bare, bucca about one-fifth the eye-height. 



Thorax with the pollen gradualh* becoming cinereous on the 

 sides; dorsocentrals 4 postsutural, 3 presutural; inner dorsocentrals 

 3 and 3, one pair being just before the suture; scutellum with 3 

 marginal pairs and a small nearly horizontal apical pair; sterno- 

 pleurals 3; calyptcrs pale \cllnw. 



Abdomen with pollen changing to gray well down on sides' 

 the specimen shows no adaptations for depositing eggs or larvie; 

 second segment with a pair of median marginal bristles; third 

 with a marginal row of 8, and some coarse hairs in the place of a 

 discal pair; fourth with a row of 8 on the middle and a few irregular 

 smaller ones at hind margin. 



Legs black, middle tibia with one spine on outer front side 

 below middle; hind tibia on outer side behind with an uneven row 

 of small bristles, two near the middle being larger. 



Wings hyaline, \eins yellow on basal half ; first posterior cell open 

 rather near apex, as far from it as one-third the distance separating 

 tips of second and third veins; third vein with 2 or three hairs at 

 base; fourth vein with angle rather abruptly rounded, not appendi- 

 culate; hind cross-vein sinuous, nearer to bend than to anterior 

 cross- vein. 



Length 7 mm.; of wing, 6 mm. 



One female, Wabam.ic, Ontario, collected by H. S. Parrish, 

 Aug. 5, 1915; deposited in the Canadian National Museum. 



I see no difficulty about referring the species to this genus, 

 aside from the fact that the "cilia," or exterior row of bristles, on 

 the hind tibia, are somewhat coarse and uneven. 



