Vol. XXVli] ENTOMOLOGICAL NEWS. 443 



Description. Black, halteres yellow. Pile black on : f rons, part of 

 face, disc of mesonotum, apices of segments 3 to 7, lateral margins ot 

 3, 5, 6, apical segments of venter and legs ; yellow or whitish on : part 

 of face, mesonotal margins, pleura, pectus, segments i to 2, bases of 

 3 to 7, lateral margins of 4, 7, and basal segments of venter. Tomen- 

 tum black on : mesonotum partly, base of scutellum, apices of segments 

 i to 4, bases of 5 to 7, antecostal cell of wing partly; pale on: lower 

 part of frons, face, occiput, mesonotum partly, scutellum except base, 

 bases of segments 2 to 4, apices of 5 to 7, antecostal cell partly and 

 legs. 



Wings hyaline with extreme base infuscate, sometimes extending 

 into the basal cells. 



Structurally similar to latcralis, but the fore tibiae with extensor 

 bristles or setulae. It is more robust with the abdomen noticeably 

 broader than the thorax. Length 12-16 mm. 



The above description is drawn from a female collected at 

 Lloydminster, Saskatchewan, Canada, July 31. 



A male, Aweme, Manitoba, Canada, Sept. i, 1903 (N. 

 Criddle), and two males, Fort Wingate, New Mexico, I also 

 place here. They have the following characters : 



Vertex broad as antennae ; frons and face black pilose and tomen- 

 tose ; some black pile on pleura ; mesonotum black tomentose and scu- 

 tellum entirely so. No conspicuous band of pale tomentum on seg- 

 ments 2 to 3, but base of 4, apices of 4 to 5 and lateral margins of 6 

 with white tomentum. 



Variations. There seems to be little variation in this species. 

 The following is the only one I have considered, and it is not 

 very satisfactory. 



variety nigropectus new variety. 



Pleura, pectus and venter black pilose. Pale abdominal bands some- 

 times very narrow or even absent. 



Holotypc. $ , Highrolls, New Mexico, June 4, 1902, (Rehn 

 and Viereck), [A. N. S. P. No. 6107]. 



Paratypes. 5 , topotypic. 



Of this form I have examined specimens from New Jersey, 

 Pennsylvania, West Virginia, Georgia, South Dakota and Kan- 

 sas, and these seem to be typical. 



This form I suspect is conspecific with hypotnelas Mcq., as a 

 variety with fasciated abdomen. If this be correct, then h\- 



