NO. 1938. THE DIPTEROUS FAMILY PHORIDM—MALLOCH. 469 



row; in carlynensis they are almost equidistant; the arista in sublutea 

 is thick, very shortly pubescent, and barely longer than frons, while 

 in the new species it is thin, distinctly pubescent, and at least one- 

 third longer than frons ; the palpi are also darker, much more strongly 

 bristled, and there are about six regular, strong bristles on the side 

 of the face in carlynensis. Besides these points the mesopleural 

 bristles are regular and only about 8 in number; there is a distinct 

 black mark on the pleursB below wing base and another behind on 

 mid coxse, the abdomen is, except narrow fore and hind marginal 

 bands on segments 2-4, all brown-black; the hind tibial setulse are 

 strong and on apical third widely placed; the first costal division 

 of wing is equal to the next two, the third about one-half as long as 

 second; the costal fringe is about twice as long as diameter of costal 

 vein; the fork of third vein is not so acute as in sublutea, and the 

 fourth vein leaves at distinctly beyond fork. 



Length, 2 m. m. 



Type.— Cat. No. 15241, U.S.N.M. 



Locality: Glen Carlyn, Vii-ginia, August 12, 1912 (F. Knab). One 

 female. One male, Rosslyn, Virginia, September 22, 1912, Malloch 

 and Knab. 



APHIOCH^TA FLAVA FaUen. 



Yellow; frons gray dusted, black or brown, lower pair of post- 

 antennal bristles small, antennae yellow, palpi yellow; thorax dark 

 reddish yellow, narrow, only two scutellar bristles ; abdomen narrow, 

 segments subequal, the bristles on second abdominal segment very 

 inconspicuous, hypopygium of male projecting, the anal protuberance 

 rather small and dusky yellow, dorsum of abdomen nearly all brown- 

 black, but mdistinctly paler on first segment and base of second, 

 costa to at least the middle of wing, first section shorter than second, 

 costal cells narrow, fringe short; legs slim, the hind tibiae not much 

 thickened, the setulse small and numerous (15-16) and very crowded 

 on basal fourth; halteres yellow. 



Length, l|^-2 mm. 



There is one specimen in the collection from the District of 

 Columbia. 



APH10CH.ETA SUBFLAVA, new species. 



Male and female. — Yellow; frons yellow, posteriorly darkened m 

 both sexes, lower post-antennal bristles about one-fourth the size of 

 the upper pair, antennae yellow ; thorax yellow, two microscopic haii-s 

 anterior to the two strong bristles, abdomen broader than in lutea, 

 and not so long in male comparatively, segments 2-4 with lateral 

 black triangular marks, fifth yellow, sixth black, several distinct 

 bristles on lateral margins of second segment, hypopygium of good 

 size, protruding as mjUwa, but the anal protuberance is much more 

 conspicuous, of a paler color, and has two strong hairs at the extremity 



