1896.] ENTOMOLOGICAL NEWS. 187 



its base; fore femur of the female thickened at the base, but 

 tapering to the apex, without the deep notch, and with several 

 stout bristles along its under surface; inner side of hind trochanter 

 of male armed with a thick and pointed spur; first joint of hind 

 tarsi without bristles, twice the length of the second joint; pul- 

 villi of all the tarsi dilated. Wings long and of rather uniform 

 width, with prominent anal angle; cross-vein oblique, only half 

 its length from the posterior margin; third and fourth veins lyrate, 

 more parallel at their terminations; sixth vein small and indistinct. 

 The genus Parhydrophorus is closely allied to the genera Scellus 

 and Hydrophorus, especially to the latter. The male may be 

 readily distinguished from the male Hydrophoriis by the deep 

 notch in the fore femur, the prominent spur on the hind trochan- 

 ter, and the structure of the hypopygium. The unpaired spoon- 

 shaped appendage of the latter organ is represented in Hydro- 

 phorus by a pair of small appendages. The whole hypopygium, 

 too, in the latter genus is smaller and much more concealed. 

 Both the male and female of Parhydrophorus lack the spur-like 

 projection at the tip of the fore tibia, a character which is strik- 

 ingly developed in Scellus, and also faintly developed in many 

 species of Hydrophorus. In general appearance the flies of the 

 new genus differ from the species of Hydrophorus in the longer 

 and whiter hairs covering the legs and the greater portion of the 

 body. 



Parhydrophorus canescens nov. sp. 



Male. Antennae black, basal joint more brownish in a certain light; 

 arista thick, black, with a white tip. Face so thickly covered with white 

 dust that the ground color is invisible. Palpi grayish, with rather long 

 white hairs; front covered with an extension of the white dust of the face, 

 but less thickly, so that the coppery green ground color may be seen; 

 frontal bristles and the stout hairs of the superior orbit black, the rather 

 dense beard on the inferior orbit glistening white, or in some specimens 

 more yellowish; occasionally also with an admixture of black hairs above. 

 Thoracic dorsum metallic-green, with four narrow cupreous villa- ; in 

 many specimens these are indistinct and seem to have fused to form a 

 large cupreous patch posteriorly. The small hairs arranged in rows d> <\\ -n 

 the middle of the thoracic dorsum are white, the bristles in the lateral 

 rows black. Pleurae dull metallic-green anteriorly, blackish posteriorly, 

 covered with a rather thick layer of gray dust. There is a conspicuous 

 tuft of delicate white hairs just above the insertion of the fore coxa and 

 another tuft of longer and sparser white hairs above the insertion of the 

 middle coxa ; scutellum metallic-green or coppery, with black bristles. 



