PAEYDRA. 167 



3. P. Treviceps LOEW. 9 Nigro-senea, facie subperpendiculari, scu-~ 

 tello mutico, venis alarum transversis obscure lirubatis. 



Blackish-aeneous, face rather perpendicular, scutellum without warts ; 

 transverse veins of the wing margined with obscure. Long. corp. 0.16. 

 Long. al. 0.16. 



Blackish-aeneous^. Face dusted with brown, less projecting 

 than in any other Parydra known to me, consequently almost 

 quite perpendicular. Orbitae excessively narrow ; the characteris- 

 tic small bristle on each side.of the face is of moderate length and 

 rather slender; beneath it there are a few shorter distinctly visible 

 hairs. Clypeus very narrow ; cheeks broad. Antennae black ; 

 the bristle rather slender even at its basal half, hair-like towards 

 its end, with a short but distinct pubescence on its upper side 

 reaching beyond the middle. Thorax rather indistinctly striped ; 

 scutellmn without tubercles, as is the case in the European species. 

 Femora black. Tibiae reddish-brown, with a little white reflection 

 at the base and tip, but in the specimen now before me it is too 

 rubbed off to afford any certainty about its extent and nature. 

 Abdomen rather shining, almost with a band of whitish-gray hoar 

 on the posterior border of each segment. Wings rather tinged 

 with grayish, having blackish margins on the transverse veins, the 

 surface of the wings being more hyaline in their neighborhood. 

 The second longitudinal vein is considerably shorter than in the 

 two preceding species, in consequence of which the second segment 

 of the costa is but little longer than the third ; the ends of the 

 third and fourth longitudinal veins are parallel ; the fifth longitu- 

 dinal vein curves a little posteriorly at the second half of the dis- 

 coidal cell. 



Hob. Middle States. (Osten-Sacken.) 



4. P. pailllula LOEW. $>. Omnium minutissima, facie proclivi, 



genis angustis. 



Very "small; face projecting obliquely, cheeks very narrow. Long. corp. 

 0.060.07. Long. al. 0.060.07. 



A very small species, of which I have only a single somewhat 

 immature specimen, so that I am unable to say more of its colors 

 than that they appear to differ little from those of the other species. 

 Face descending obliquely, and therefore rather projecting with 

 its lower parts ; the characteristic bristle on each side rather long 



