438 ENTOMOLOGICAL NEWS [DeC, '14 



brown hairs on the front surface; middle tibise with two and hind tib- 

 iae with three bristles on the upper surface ; middle and hind femora 

 with a preapical bristle. 



Tegulae yellow with black tips and brownish cilia; halteres yellow. 



Wings gra^ash hyaline, with brown veins ; rounded at tip. 



Described from one male taken by Mr. Nathan Banks at 

 Falls Church, Virginia, on May 30. 



I place this little species in this genus as it is closely related 

 to P. salax Wheeler, although his generic description would 

 have to be modified to receive it, as this species has but two 

 scutellar bristles and the wings are rounded at the tip. I 

 should give the characters of the genus as : Antennae of the 

 male as long as the head and thorax with thick terminal arista, 

 third joint and arista pubescent, first joint bare above; hypo- 

 pygium large, sessile, with small hook-like appendages ; wings 

 with the third and fourth veins parallel ; sixth vein distinct ; 

 posterior cross-vein perpendicular to the wing margin, distant 

 from the tip of the fifth vein about twice its length. Prof. 

 Wheeler does not mention the bristles of the thorax, but in 

 my species there are no acrostichal bristles ; the other bristles 

 are strong. 



PSILOPIELLA n. gen. 



W'ings with the fourth longitudinal vein forked, and the 

 sixth longitudinal vein present ; posterior cross-vein twice its 

 length from the wing margin, measured on the fifth vein ; face 

 of female wide, scarcely narrowed below; front wide, vertex 

 not excavated ; ocellar tubercle not prominent ; there are ocel- 

 lar, vertical and postvertical bristles ; antennae with the first 

 joint bare above, second joint with small bristles at apex, third 

 joint short in the female, pubescent; arista dorsal, pubescent. 



Thorax with a small flattened space before the scutellum; 

 without acrostichal bristles; five dorsocentral, a humeral, a 

 very small presutural, two notopleural, and a supraalar bristle, 

 all these bristles rather small ; a minute bristle above the fore 

 coxae ; scutellum with a pair of large bristles and a pair of 

 small hair-like bristles outside of these. 



Legs rather slender ; hind coxae with an erect bristle on the 

 outer surface ; tibiae with one or two small bristles ; first and 



