HYDRELLINA. 155 



Scntellum deep black, opaque, with a uarrow subcinereous border. 

 Pleurae black, with a broad, shining white band above. Abdomen 

 black, opaque, the apical half as well as the lateral borders shining. 

 Femora black; tibiae and tarsi pale yellowish, the upper edge of 

 the former with a white reflection, terminal joint of the latter 

 black. Halteres pale lemon-yellow. Wings cinereous-hyaline, 

 second segment of the costa somewhat longer than the third ; third 

 longitudinal vein ending at the very tip of the wing ; posterior 

 transverse vein occupying the middle between the basis and the 

 tip of the wing. 



Hab. Pennsylvania. (Osten-Sacken.) 



Observation. — This species, although very much like Philhygria 

 picta Fall, and the allied species, proves to be a true Hydrellia on 

 account of the short and very dense pubescence of its eyes. 



Gen. II. PHILYGRIA Stenh. 



Haliday has employed for this genus the name Hydrina, given 

 by Rob. Desvoidy; but as this name, being derived from Hydra, 

 is also used in the family of Polypi, it seems more advisable to 

 adopt for it the name Philygria of Stenhammar ; otherwise this 

 name would not be used at all, the two other genera, which joined 

 with the present, form the genus Philygria of Stenhammar, being 

 already possessed of their authorized names, Hyadina and Axysta. 

 The genus Philygria, taken in the present sense, may be character- 

 ized in the following manner: Second joint of the antennas not 

 unguiculated; antennal bristle with a short pubescence. Eyes dis- 

 tinctly hairy, rather rounded, but higher than broad, slightly pro- 

 minent. Face descending obliquely, narrowed upwards, receding 

 a little towards the mouth, the anterior border of which is a little 

 pointed; on both sides there are distinct bristles. Clypeus unde- 

 veloped ; mentum rather thickened ; cheeks slightly descending. 

 The costal vein attains the fourth longitudinal vein ; the posterior 

 transverse vein is rather distant from the border of the wing. 



1. P. fuscicornis Loew. Fusco-cinerea, abdouiine nigricante, facie 

 flavescente, pedibus nigris, tarsis rufis, in apice fuscis, alis cinerascen- 

 tibus, cellula discoidali et gutta pone venam transversani posteriorem 

 limpidioribus, venis transversis fusco-limbatis. 



Brownish-gray; abdomen blackish, face yellowish; wings gray with the 

 discoidal cell and a drop behind the posterior transverse vein more hya- 



