June,igi4 Bulletin of the Brooklyn Entomological Society 59 



tibia with the setulse distinct, but hairhke. Wings elongate, costa 

 to distinctly short of the middle; first costal division about 3 times 

 as long as second ; angle at fork of third vein acute ; third costal 

 division half as long as second ; fourth vein leaving at fork of third 

 with a slight bend, running almost straight to margin and ending 

 at distinctly in front of wing tip without recurving ; costal fringe 

 fine and close, the hairs about 3 times as long as the diameter of 

 costal vein. 



Length : 1.5 mm. 



Locality: Algonquin, III, Nov. 16, 1896 (W. A. Nason). 



This species is named in honor of Dr. W. A. Nason. It differs 

 from ciliata Zetterstedt and sitbciliata Malloch in being brownish 

 instead of deep black, in having the frons less glossy, and in the 

 wing venation. 



Aphiochaeta plebeia, new species. 



Male: yellow. Frons brownish, antennae and palpi yellow. 

 Mesonotum brownish on disc. Legs yellow. Wings clear, veins 

 brown. Halteres yellow. 



Frons subopaque ; lower pair of pentamerals more than half as 

 large as upper pair ; central pair of first row bristles distinctly 

 lower on frons than outer pair and nearer to center ; antennae 

 small, third joint rounded; arista longer than frons, pubescent; 

 palpi slightly larger than antenna, distictly bristled. Mesopleura 

 with numerous short setulse ; scutellum with 2 bristles and 2 micro- 

 scopic anterior hairs, in the female these hairs are about half as 

 large as the bristles. Abdomen tapering, segments subequal; no 

 distinct lateral bristles on second segment ; anal protuberance small. 

 Hind tibial setulse, 9-10, not as long as the tibial diameter. Costa 

 to wing middle, first and second divisions subequal, third about 

 one fourth as long as second, angle at fork of third vein acute; 

 costal fringe fine and close, the hairs about three times as long 

 as diameter of costal vein ; fourth vein leaving at fork of third 

 greatly arcuate, ending distinctly before wing tip. ■ 



Length: 1.5 mm. 



Locality: Urbana, 111., July 18, 1885, reared from larvae found 

 in decaying vegetation. No. 6,889, ^l- State Lab. Nat. Hist. 



Allotypes: Two specimens, same data as type. 



