368 CHARLES T. BRUES. 



which it differs in not having the hind femora enlarged; the costal 

 vein is longer also, and the halteres hlack. 



Besides the types of this species, I have seen two additional 

 specimens from St. Vincent. All are females. The altitudes at 

 which the specimens were captured vary from sea level to 1500 feet. 



Aphiochteta rufipes Meigen. (Plate vii, fig. 40.) 



Meigen, Classification, i, 313, 3. 



Zetterstedt, Ins. Lapp., 795, 3. 



Zetterstedt, Dipt. Soand., vii, 2857. 



Schiner, Fauna Austr., ii, 340. 



Coqnillett, American Naturalist, xxxi, 386. 



Coquillett, Proc. Wash. Acad. Sci., ii, 437. 



Becker, Monog. Phoridse, p. 59. » 



Male. Length 2.5-3 mm. Thorax and abdomen black, the former somewhat 

 shining, on the dorsum with unusually thickly placed short brown hairs. Scu- 

 tellum with only two marginal bristles, and dorsum with one pair of dorsocentral 

 macrochaetse. Head and antennae black, third antennal joint of moderate size, 

 with a long pubescent arista. Front gray pollinose, its bristles placed as usual ; 

 palpi yellow, with long bristles; head with a row of long bristles reaching up 

 from the border of the eye to the middle of the face. Halteres yellow. Abdominal 

 segments rather thickly covered with long, perfectly erect, blunt bristles; the 

 sutures between the segments often yellow. Legs and coxse varying from brown 

 to reddish yellow; hind femora not especially widened, usually a little darker at 

 the tips. Wings hyaline; the costal vein reaching about to the middle of the 

 wing, its bristles very long ; first segment of the costal vein about one and one- 

 half times as long ss the second. 



The female lacks the peculiar abdominal bristles which are so 

 conspicuous in the male. 



There are about forty specimens before me, representing both 

 sexes of this species, from various parts of the United States, as 

 follows: New Bedford, Mass. (Hough); Moscow, Idaho (Aldrich) ; 

 .Michigan; Pennsylvania; Algonquin, 111. (Nason) ; New York 

 City (Brues) ; Chicago, 111. (Melander). 



From this it can be seen that the species is very widely distributed 

 in this country. 



All agree exactly with the description given by Becker of Euro- 

 pean specimens, of which I have given a translation above. 



Aphiochseta albidolialteris Felt. 



Felt, Twelfth N. Y. Report, 228. 



Female. Head and thorax jet black ; palpi orange yellow; abdomen black in 



some specimens, in others the lateral margins and dorsum of terminal segments 



are dull yellow. Wings hyaline, heavy veins ochreous. Halteres brownish black 



at base, the knob yellowish white; legs a variable ochreous, with the terminal 



