8 PEOCEEDINGS OF THE NATIONAL MUSEUM vou 72 



Rostrum and palpi dark brown. Antennae brownish black 

 throughout; flagellar segments oval. Head dark. 



Pronotum obscure yellow, with a narrow median brown line. 

 Mesonotal praescutum with three brown stripes, the ground color 

 well concealed by yellowish gray pollen; scutal lobes dark, the 

 median area obscure yellow; scutellum obscure yellow; postnotal 

 mediotergite dark brown, sparsely pruinose, the lateral margins nar- 

 rowly paler. Color of the pleura obscured by glue but apparently 

 largely pale. Halteres short, pale, the knobs infuscated. Legs with 

 the coxae and trochanters pale brown, the latter more yellowish; 

 femora obscure yellow, the tips infuscated, especially the fore femora ; 

 tibiae brownish yellow, the tips becoming darker ; tarsi passing into 

 dark brown. Wings with a strong yellowish tinge, the stigma oval, 

 very slightly darker than the ground color ; veins dark brown. Vena- 

 tion: Sc short, Sc-^ ending just beyond the origin of Bs; Sc^ not 

 visible in the type, due to the flexing of the wings at this point, but 

 presumably not far removed from the tip of /6'Ci, as in the related 

 haeretica; Rs about one and one-half times as long as the basal section 

 of jS4+g ; m-cu before the fork of M. 



Abdominal tergites dark brown, the sternites yellow. Male 

 hypopygium (fig. 5) relatively large and complicated in structure. 

 Basistyle (6) darkened outwardly, the ventro-mesal lobe elongate, 

 the apex truncated and provided with setif erous tubercles, with a few 

 other setae on the mesal edge of the lobe; mesal face of basistyle 

 near apex with a low squat tubercle densely set with setae. Dorsal 

 dististyle {d) a slender curved hook, the apex acute. Ventral 

 dististyle {d) large, widened distally, sparsely provided with long 

 coarse setae; rostral prolongation stout, the two spines relatively 

 short, separated from one another by a distance about equal to one- 

 half the length of one, placed more than their own length from the 

 apex of the prolongation; basad and ventrad of the rostrum a con- 

 si3icuous low lobe, each outer angle of which bears a conspicuous 

 pencil of long yellow setae. Gonapophyses {g) with the mesal apical 

 prolongation slender. Aedeagus {a) subtended on either side by a 

 flattened, shell-like apophysis. 



Habitat. — North Dakota. Holotype, male, Minot, July 16, 1921 

 (H. G. Dyar). 



Type.—M.2le, Cat. No. 40323, U.S.N.M. 



DICRANOMYIA NEGLIGENS, new species 



General coloration gray, the praescutum with three brown stripes, 

 the median stripe narrowly split by a capillary pale line; halteres 

 pale yellow, the knobs dark brown; femora yellow, the tips broadly 

 dark brown, preceded by a slightly narrower ring of clearer yellow ; 



