SARCOPHAGA AND ALLIES 69 



Wings nearly hyaline ; third and fifth costal seg- 

 ments about equal; costal spine distinct, third vein 

 with 5 or 6 bristles. 



Female. Front .324 as wide as head (average of 

 five,— .311, .319, .322, .330, .338), with the usual two 

 pairs of orbital bristles; parafacials with a row of 

 hairs above the small bristles ; outer vertical somewhat 

 larger; palpi slightly clavate. Apical crossed bristles 

 absent from scutellum. Abdomen convex, broad, 

 with bristles as in male; genital segment black, with 

 vertical slit guarded by a row of bristles. 



Length, .5 to 9 mm. 



Fifty-three specimens, both sexes; Mass., N. Y., 

 Onatrio, Montreal, Pa., Ohio, Ind., N. D., Colo., 

 Idaho. 



Two males in U. S. N. M., from Sterling, Colo., 

 bred from 3Ielanoplus diferentialis, 'No. 4<\9x04^, 

 emerged Aug. 6, 1900. They were labeled by Co- 

 quillett Sarcopliaga aegra Walk. 



Type. — In the Meigen collection in Paris. 



I examined the type of Townsend's Sarcotachin- 

 ella intermedia, now in the Snow collection at the Uni- 

 versity of Kansas; and by the kindness of Professor 

 S. J. Hunter I was allowed to spread its genitalia, 

 thus removing the possibility of error. 



In the collection of the Illinois State Laboratory 

 of Natural History at Urbana, I found this species 

 determined by Mr. Coquillett as aegra Walker; other 

 references to aegra (N. J., Fla., and Kansas in local 

 lists) may have originated in the same way. 



Bottcher states that an occasional specimen is 

 found with 4 post-sutural dorso-centrals ; in the 53 

 specimens mentioned, there are regularly 3 except on 

 one side in one specimen, where there are 4. This 

 would be less than 1 per cent of deviation. 



Mr. Townsend has proposed the name Xenoppia 

 hf/popi/gialis new genus and species for the specimen 

 determined by Coquillett as Brachi/eoma intermedia 

 Tns. I have not seen it. Johnson's references to in- 

 termedia (supra) may refer to the latter species. 



