THE CANADIAN ENTOMOLOGIST. 317 



polished, grayish-pruinose ; sides of the abdomen only very slightly 

 reddish tinged, fourth segment densely yellovvish-poUinose, not 

 polished, the colour of that segment contrasting somewhat with the 

 colour of the remainder of the abdomen, which is more bluish-gray ; 

 second and third segments in the male each with a pair of weak 

 discals, in female there is but one of these on the second and a pair 

 on the third segment. Length, 9 mm G. sierricola Town. 



6. No well-developed ocellar bristles ; fourth abdominal segment densely 



covered with yellow pollen, its colour contrasting strongly with that 

 of the remainder of the abdomen, which is bluish ; face and front like 

 fourth abdominal segment, yellowish-pollinose, and when viewed from 

 the side a brown-reflecting spot of greater or less extent appears 

 below the lowest frontal bristles. Length, 9 mm. The species 



superficially resembles Exorista fntilis O. S G. ocellar is Coq. 



Ocellar bristles strong, proclinate 7. 



7. Fourth abdominal segment concolorous with the preceding segments ; 



the abdomen grayish, brassy-pollinose, with blackish reflections ; 



parafacials densely bluishpollinose, the pollen of the front slightly 



tinged with golden. Length, 8-10 mm G. orga?iefisis Town. 



Fourth abdominal segment yellowish-pollinose, its colour contrasting 



somewhat with the remainder of the abdomen ; second and third abdo- 

 minal segments with weak discal macrochaetse ; pollen of face and 



front yellowish. Length, 9 mm. (See under 



No. 5) G. sierricola Town. 



Mr. Coquillett has kindly furnished me with the locality records for 

 these species, which are as follows : 



G. flavipes Coq. — Tifton, Ga., and Opelousas, La. 



G facialis Coq. — Georgia (type). 



G. cockerelli Coq. — White IMts. (type), and Las Cruces, N. IMex.; 

 Chisos Mts., Brewster Co , Texas, and Sierra Madre, Chihuahua, Mex. 



G. setosa Coq — Siskyou Co., Cal. (type); White Mts. and Rio 

 Talarosa, N. Mex., and Sierra Madre, Chihuahua, Mex. 



G. sierricola Towm. — Sierra Madre, Chihuahua, Mex. 



G. ocellaris Coq — Ohio (type) ; Angora Fern Rock and Philadelphia, 

 Pa., and Franconia, N. H. 



G. organcJisis Town. — Organ Mts., New Mexico (type). 



From these records it seems that ocellaris is a northeastern species, 

 flavipes and facialis are southern central forms, and all the others are 

 southwestern species. 



