E. T. CRESSON, JR. 49 



hyaline marked with numerous, rounded fuscous spots between the veins 

 as figured. Opaque to subopaque; frons opaque yellow, its stripe, thorax 

 and abdomen more or less cinereous. Length. — 3-4 mm. 



Type.— d"; Illinois, [A. N. S. P. no. 6222]. 

 Specimens Examined. — 1 c? and 89. 



Canada: Downie Creek, Selkirk ^lountains, British Columbia, VIII, 9, 

 (J. C. Bradley), [Cornell]. 

 New York: Ithaca, VII, 31, [Cornell]. 

 Illinois: (type). 

 Montana: Beaver Creek, VIII, (S. J. Hunter), [Kansas]. 



Subgenus DITAENIA Hendel 

 1902. Hendel, Abth. Zool.-Bot. Ges., Wien, ii, 66. 



As a genus this was originally based on the presence of a median 

 frontal stripe extending to the base of the antennae, generally 

 shining, di voiding the frontalia into two narrow, more or less 

 opaque, stripes. It seems to me that Hendel's conception of 

 the genus was not very good, as this character will include several 

 forms that otherwise seem to be generically distinct. In 1910, 

 Hendel^ considered this a subgenus of Melina. Based on the 

 tj'pe-species, Sciomyza cinereUa Fallen (1820), which I have seen, 

 this seems logical, as the structure of the head is very similar. 

 Our species, however, are apparently not subgeneric with cinerella, 

 but I do not care to erect another subgenus in this group without 

 further study of other European species. 



In the setulose mesopleura and single frontal bristle the species 

 here included simulate puhera, but there the simulation ceases. 

 In the distinct median frontal stripe and distinct propleural 

 bristle they are quite distinct. For a proper conception of the 

 subgenus, it may be diagnosed by the narrow head, frons and 

 face; frons with only one frontal, and the face rather distinctly 

 subcarinate and produced at the epistoma. The mesonotal stripe 

 is more or less distinct and shining. Our species, also, have the 

 wings immaculate, with the exception of the clouded cross- veins; 

 the pteropleiu'a with distinct bristles. 

 Melina (Ditaenia) grisescens Meigen 

 1830. Sciomyza grisescens Meigen, Syst. Beschr., vi, 20. 

 1876. Sciomyza humilis Loew, Ztit. iC.r Ges. ISiaturw., xlviii, 330. 

 1902. Ditaenia grisescens Hendel, Abh. Zool.-Bot. Ges., Wien, ii, 66. 



5 Wien. Ent. Zeit., xxix, 310. 



TRANS. AM. ENT. SOC, XLVI. 



