34 A REVISION OF THE NEARCTIC SCIOMYZIDAE 



the first vein suggests Dryomyza. They are easily overlooked. 

 The black abdomen and tarsi, and the pubescent arista are also 

 characteristic. 



DRYOMYZA Fallen 

 1820. Fallen, Dipt. Suec, Sciom., 15. 



This well known genus has been rather misused, and evidently 

 not well understood. In this short study I have secured same 

 very interesting results which will help to establish the status of 

 the genus. In most of the present catalogues the genus is placed 

 in a distinct family bearing its name. I can not follow this 

 treatment. 



The genus was originally proposed for the reception of two 

 species — Dryomyza vetula Fallen, and Dryomyza anilis Fallen. 

 The former is synonymous with Musca flaveola Fabricius (Meigen, 

 1826) which was designated, by Westwood in 1840, as the type 

 species of this genus. Dryomyza anilis was made, by Rondani, 

 the type species of his new genus Neurodena (1868). The two 

 genera are listed in Aldrich's Catalogue, page 578, as distinct, 

 but upon a study of the literature and some American collections 

 it is evident that the two genera, or, even the two species, were 

 not well understood. I cannot follow Hendel in recognizing the 

 projecting epistoma as a family character. There seems to be 

 too much intergradation in this respect. The two genera may 

 with propriety, however, constitute a distinct subfamily of the 

 Sciomyzidae. 



Genotype. — Musca flaveola Fabricius (as Dryomyza vetula Fallen). 

 Dryomyza dayi new species (PL II, fig. 22.) 



This may be merely a subspecies of the European /ai'eo/a, which 

 I have examined, but it is not identical. Our form is smaller 

 with longer face; epistoma not so prominent and the antennae 

 more porrect. The bristles seem to be weaker; those of the 

 sternopleura in the male of flaveola are strong. 



This species may be found in most collections under the name 

 of Neuroctena or Dryomyza anilis, but it is easily separated from 

 that species by the first vein of the wings being bare. 



c?. Yellow to tawny; mesonotum and abdominal segments sometimes 

 dark; setulae and bristles, black; ()ile of occijiut, uleura, pectus, abdomen 

 mostly, and femora, pale. Wings yellowish-hyaline; cross-veins more or less 

 clouded. 



