108 PROC. ENT. soc. WASH., VOL. 21, xo, 5, MAY, 1919 



Wings yellowish, veins decidedly yellow; third vein bare, costal spine small, 

 hind crossvein straight, last segment of fourth vein hardly exceeding the one 

 before it. 



Length, 4 1 / 2 to 6 mm. 



Twenty-two males, twenty-seven females; Carondelet, Mo. 

 (Pergande); one male, Santa Fe, N. M. (Townsend); one male, 

 Pecos, N. M. July 7 (Cockerell). 



Type, male, and allotype, female, from the Missouri material; 

 all the rest paratypes (U. S. M. No. 22172). 



The Missouri specimens are numbered 86290, under which Mr. 

 Pergande's note is as follows: "Oct. 9, 1877. Found in the clay 

 banks north of Carondelet numerous cells of a species of Bombus 

 (later determined as Anthophora abrupta Say). Some of the cells 

 were infested by dipterous parasites, of which the empty cocoons 

 could be found in large numbers; one cell contained cocoons 

 which seemed to be sound yet, they are placed in bottle marked 

 86290." Dates of issuing are marked on several labels, ranging 

 from April 11 to May 2, 1878 all emerging apparently the fol- 

 lowing spring. It is an interesting commentary on the state of 

 Anthomyid classification, that this material should have stood 

 unidentified in the Bureau and later in the National Museum for 

 more than forty years. 



Sphenomyia, new genus, 

 o- 4> t\' v, wedge; /j. v i a, fly. 



Belongs in subfamily Phaoniinae (sixth vein not reaching margin of wing, 

 scutellum bare below, hind calypter projecting widely behind front one) 

 in which it is one of the genera. Head as in Limiiophora except in 

 having in the female a sharply-defined, long wedge-shaped frontal triangle 

 which reaches to the lunule and is highly polished throughout; orbits 

 dull, antennae, palpi and proboscis of ordinary form; arista bare (at 20 di- 

 ameters), third antennal joint not twice the second, not quite reaching the 

 vibrissae, which are at oral margin. Prealar and anterior acrostichal bristles 

 lacking; dorsocentrals 4-2; sternopleurals 1-1; notopleurals 2; humeral 2; 

 intrahumeral 1; posthumeral (presutural) 1; intra-alar 2; postalar 2; supra- 

 alar 1 ; scutellar 2 pairs (female) ; pteropleura and hypopleura bare. Abdomen 

 without trace of paired spots, the female genital segment as in Hebecnema 

 (Xenaricia Malloch). Legs weakly bristled, as in Hebecnema, hind coxae 

 bare behind. Wing as in Hebecnema, except for the half-dozen hairs above 

 and the same below, on basal part of third vein. 



Type species, kincaidi, described below. 

 Sphenomyia kincaidi, new species. 



Wholly black except bases of halteres, which are brown, and calypters, 

 which are white; Parafacials in profile above as wide as third antennal joint. 



