494 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



Length, 2 mm. 



Type.— Cat. No. 14892, U.S.N.M. 



One female, Cabin' John Bridge, Maryland, September 19, 1900; 

 no other data. Labeled "Pliora rujiyes Meig." 



I took a male while collecting at this same locality on April 28, 

 1912, along with Mr. F. Knab, which belongs, I believe, to this species. 

 It is decidedly darker in color and the lower post-antennal bristles 

 are present, though small. 



APHIOCHiETA MINOR Zetterstedt (=MINUTA Aldrich). 



Shining black species; frons longer than broad, highly polished, 

 post-antennal bristles of equal size, the upper pair much wider apart 

 than the lower, center pair of bristles in first row much below the 

 outer pair, and hardly further from eye-margin, arista short, barely 

 as long as frons, male palpi large, black or brown, female normal, 

 yellow; legs black, only fore coxse in male, and fore coxae and fore 

 legs in female yellowish, hind tibial setulse rather distinct and widely 

 separated in male, more crowded and indistinct in female; wings 

 dusky, male costa short of middle, female to the middle, first division 

 half again as long as second, fringe very short, fourth vein nearly 

 straight at base ; halteres yellow. 



Length, 1-1 ^ mm. 



In collection: Aldrich's type of minuta, Brookings, South Dakota. 

 One male, Biscayne Bay, Florida, and one female, Mount Washington, 

 New Hampshire (Mrs. A. T. Slosson). 



APHIOCHiETA RUFEPES Meigen. 



Black or brown; frons dull, nearly twice as broad as long, post- 

 antennal bristles very strong, the lower pair as large as the upper 

 and situated very close to them, palpi yellow, normal; thorax black 

 or brown, hardly shining; abdomen black, in male very narrow and 

 slender, with very long scale-like hairs on lateral and posterior 

 margins of segments, hypopygium short, anal protuberance incon- 

 spicuous; female abdomen of normal shape and with only scattered 

 hairs; legs yellow to brown, hind femora darker, hind tibiae with 

 numerous closely placed weak hairs on postero-dorsal surface ; wings 

 yellowish, costa to middle, first division twice as long as second in 

 male, barely that in female, fork of third vein acute in female, but 

 less so in male, fourth vein bent at base, but not very distinctly so, 

 fringe very long and strong ; halteres yellow. 



Length, 2^-3 mm. 



Probably the commonest species of the genus; met with all over 

 Europe as well as America. It may be met with during every month in 

 the year, and I have seen it active (in a house) in western Canada in No- 

 vember. It is very commonly found in beehives, and is a scavenger 



