SAECOPHAGA AND ALLIES 255 



Legs black; middle femur with combs in front 

 and behind; middle tibia with two bristles on the 

 outer front side ; hind tibia not villous. 



Wings slightly brownish, no costal spine; third 

 costal segment slightly longer than the fifth; first 

 vein bare; third with a few hairs. 



Female. Front .368 of head (average of five, — 

 .343, .361, .361, .376, .400) ; rows of frontal bristles 

 not divergent, even approximated below, with the 

 usual orbitals and outer verticals developed. 



Abdomen broad; genital segment pollinose, red- 

 dish in ground color with an oval opening enclosing 

 a red terminal segment ; middle femur not with comb. 



Length 6.5 — 12 mm. 



Several hundred specimens of both sexes from 

 East Eddington, Me., to Kanaka Bay, San Juan 

 Island, Wash.; Marshall Pass, Colo., altitude 10,856 

 feet; Mono Lake, Cal., 6,300 feet; Pine Lake, Cal. 

 (C. F. Baker) ; one male. District of Columbia, issued 

 August 12, 1889, bred from cow dung (collection C. 

 V. Riley No. 4285-6) . This is a very abundant scav- 

 enger species in the north. Parker states that it is 

 often found feeding or larvipositing on human excre- 

 ment. The typical form seems to become rare south- 

 ward at about the latitude of Washino^ton and the 

 Ohio river. Farther south it is replaced by the vari- 

 ety ochracea. 



Several typical specimens in Mr. C. W. John- 

 son's collection are from the Bermuda Islands. 



Holotype. — In the collection of the Massachu- 

 setts Agricultural College; a paratype is in the Na- 

 tional Museum (No. 18424). 



No. 121. Sarcophaga communis var. ochracea n. var. 



Male. Front .200 of head (average of five, — 

 .192, .198, .215, .216, .222) ; parafrontals and para- 

 facials and front half of bucca with a strongly ochra- 

 ceous tinge, which also extends along the hind orbit 

 of the eye. Thorax with yellowish gray pollen and 

 rather distinct stripes. Abdomen with yellowish pol- 



