PARYDRA. 165 



1. P. Mtuberculata Loew. % and 9. — Ex brunneo senescens, 

 alis cinereo-hyalinis, venis transversis nigro-limbatis, scutello bituber- 

 culato. 



Brassy-brown, wings grayish, with, black margins of the transverse veins ; 

 scutellum with two warts. Long. corp. 0.17 — 0.18. Long. al. 0.17. 



Yery similar to Parydra aquila Fall, in size, form, and color. 

 Face proportionally not very prominent, dusted with brown ; the 

 characteristic bristle on each side proportionally slender ; upwards 

 near it, but a little more towards the middle of the face, is a rather 

 distinct, impressed spot; the shorter hairs inserted beneath it are 

 hardly perceptible. Orbitae and cheeks very broad ; clypeus very 

 prominent. Antennae black ; antennal bristle hair-like and bare 

 towards the end, stouter about the middle, and with a short pubes- 

 cence on the upper side. Upper side of the thorax with rather 

 indistinct stripes ; the rows of fine punctures, including the stripes, 

 a little more distinct than in the other species. Scutellum at the 

 tip with two not approximated warts, bearing at the end the two 

 usual small bristles of the scutellum. Legs dark, with only the 

 tarsi usually red with black tips ; there are individuals with much 

 darker tarsi ; the white reflection at the base and tip of the tibiae 

 not very striking. Wings clouded with grayish, having brownish- 

 black veins and black margins of the transverse veins, in the 

 neighborhood of which the surface of the wings is more distinctly 

 hyaline ; the second segment of the costa is nearly twice as long 

 as the third ; the ends of the third and fourth longitudinal veins 

 parallel. There are some specimens, the faces of which are dusted 

 with dull whitish ; but these certainly belong to the same species. 



Sab. Middle States. (Osten-Sacken.) 



2. P. quadritufberculata Loew. % and 9 .— Nigro-senea, alis 

 hyalinis, venis transversis interdum nigro-limbatis, scutello quadritu- 

 berculato. 



Brassy-black, wings hyaline, transverse veins sometimes margined with 

 blackish ; scutellum with four warts. Long. corp. 0.17. Long. al. 0.17. 



Similar to the preceding species in color, but a little blacker, 

 not quite equalling it in size. Face generally dusted with white, 

 the dust less frequently quite yellowish on the upper part ; the 

 under part of the face projects somewhat less than in Parydra Mtu- 

 berculata; the characteristic bristle on each side is very slender and 



