8 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol.64. 



of the blade with a short, stout spine. Lateral gonapophyses small, 

 flattened, the surface with microscopic spinulae. 



Described from two males and one female, collected at Missoula, 

 Montana, July 6, 1917 (H. G. Dyar). 

 ^\Ty:pe. —M&le, Cat. No. 26085, U.S.N.M. 



GONEMPEDA, new subgenus. 



Characters as in the subgenus Empeda but vein R2 oblique in 

 position, straight, cell R2 being short-triangular as in Gonomyia; 

 cell 1st 2I2 closed. 



Type of the subgenus. — Erioptera flava Schummel (Palaearctic) . 



In the subgenus Empeda [type, Erioptera {Empeda) stigmatica 

 (Osten Sacken) ], veins R^ and R3 run generally parallel to one another 

 and cell R2 is not as in Gonomyia but more nearly as in Erioptera 

 although much shorter. Other species definitely referable to 

 Gonempeda are E. (G.) nyctops Alexander (Eastern United .States) 

 and the species described herewith as E {G.) hurra. 



ERIOPTERA (GONEMPEDA) BURRA, new species. 



Head yellow, the vertex with a reddish brown area; mesonotum 

 reddish brown; wings nearly hyaline; veins distinct, brown; Sc long; 

 R2 oblique; cell 1st if, closed; vein 2d A straight. 



Female. — Length about 3.8 mm.; wing 4.2 mm. 



Kostrum yellow; palpi pale brown. Antennae brown. Head 

 yellow, the vertex with a conspicuous brown median area. 



Pronotal scutum brown, the scutellum yellow. Mesonotum 

 reddish brown, the praescutum of the type somewhat discolored. 

 Pleura yellow. Halteres pale, the knobs dark brown. Legs with 

 the coxae and trochanters yellow; remainder of the legs brown. 

 Wings nearly hyaline; veins distinct, brown. Venation: Sc long, 

 Sci ending opposite r; SC2 rather far from the tip of Sc^, Sc^ alone a 

 little longer than the basal deflection of Cu^] Rs long, gently arcu- 

 ated; r a little more than its own length beyond the fork of R2+3', 

 i?2 oblique, about as long as the second section of R2+3] cell 1st M^ 

 closed; basal deflection of Cu^ at about one-fourth the length of cell 

 1st M2; vein 2d A straight. 



Abdomen brown; ovipositor with the elongate valves reddish 

 horn-color. 



Described from one female collected at Tahoe City, California, 

 June 20, 1920 (H. G. Dyar). 



Type.—Fem&lQ, Cat. No. 26086, U.S.N.M. 



GONOMYIA (GONOMYIA) POLIOCEPHALA, new species. 



General coloration yellow, variegated with brown; head brownish 

 gray; thoracic pleura yellowish white striped with brownish gray; 

 Sc^ ending opposite the origin of Rs; male hypopygium with the 



