100 THOMAS SAY FOUNDATION 



Legs black ; middle femur with two rows of bris- 

 tles below but no combs ; middle tibia with one bristle 

 on outer front side ; hind tibia not villous. 



Wings hyaline ; no costal spine ; third costal seg- 

 ment equals fifth; first vein bare, third hairy almost 

 to crossvein. 



Female. Front .285 of head (average of two, — 

 .265 and .304), with the usual two orbitals; outer ver- 

 tical bristle large; lower facial hairs rather bristle- 

 like ; scutellum without apicals ; genital segment black, 

 with slit-like orifice; middle femur with lowxr rows of 

 bristles very feebly developed; middle tibia with two 

 bristles on outer front side. 



Length; 5I/2 mm. 



Six males, two females; one pair from Los An- 

 geles, Cal.; sent by Dr. Anstmther Davidson, reared 

 by him from a nest of Epeira argentata lutatius, the 

 nest accompanying the material ; one female, Moscow, 

 Idaho, June 19, 1910, which has been compared with 

 the type material of the species in the National Mu- 

 seum, and is so labeled; one male. Midland, Texas, 

 Nov. 12, 1914 (Bishopp No. 3983, adult on fresh cow 

 manure) ; one male, Havana, Cuba, collected by C. F. 

 Baker; two males in the Hough collection without lo- 

 cality, one marked June 22. 



Originally described from two male specimens 

 bred by Dr. Anstruther Davidson from nest of Plii- 

 dipinis opifex McC. at Los Angeles ; in the reference 

 given abo\e, Dr. Davidson mentions rearing other 

 material, including what I have seen from him. 



Holotype.— Male, in U. S. N. M. 



No. 40. Sarcophaga atlanis n. sp. 



Male. Front rather narrow, .144 of head (aver- 

 age of three,— .133, .143, .155) ; frontal stripe at 

 least twice as wide as one side; frontal bristles more 

 numerous than usual, 11 to 13 in number; strongly 

 divergent below, reaching below the middle of the 

 second antennal joint. Parafrontals and parafacials 

 shining gray pollinose, the latter with a row of coarse 



