128 



DIPTERA OF NORTH AMERICA. 



Observation. The genera Actora and Dryomyza, differing in 

 some characters from the true Sciomyzidce, are not comprised in 

 the above exposition. I have not seen the N. A. Actora, pub- 

 lished by Mr. Walker as Actora ferruginea. The two N. A. spe- 

 cies of Dryomyza I know, fall both into that section which is 

 characterized by a hairy third longitudinal vein ; the first is, as it 

 seems, identical with the European Dryomyza anilis Fall. ; the 

 second, though resembling in its colors Dryomyza flaveola Fabr., 

 may easily be identified by the subjoined description. 



Dryomyza simplex LOEW. Pallide flava, niteus, fronte et an- 

 tenms saturate flavis, opacis ; alse cinereo-kyalinfe, vena longitudinal! 

 terti& pilis longis vestita. Long. corp. 0.28. Long. al. 0.31. 



Polished, pale yellow. Front deeper yellow, opaque, with the 

 short pubescence and the bristles black. Antennae concolorous 

 with the front; antennal bristle with rather long and black hairs. 

 Wings limpid, with a distinct yellowish-gray tinge ; the third 

 longitudinal vein beset with long hairs; the posterior transverse 

 vein obsoletely clouded with grayish, the small transverse vein not 

 clouded. 



Hob. Middle States. (Osten-Sacken.) 



