Dec. 1899.] COQUILLETT : On NoRTH AMERICAN TrYPETID.^. 265 



yellow, the femora, except their apices, dark brown ; wings dark brown, the base 

 hyaline, including the costal and marginal cells to apex of auxiliary vein except a 

 costal dot near middle of the former, the first basal cell to apex of the second basal cell, 

 also the whole of the latter and of the anal cell ; a hyaline spot just beyond apex of 

 first vein extending to the third slightly beyond the small crossvein, a rounded spot just 

 beyond this in the marginal cell, a smaller one on lower side of third vein just before 

 the hind crossvein, three small marginal ones in the second posterior cell and a larger 

 one along the fourth vein shortly beyond the hind crossvein, three marginal and 

 about six discal spots in the third posterior cell, the hind margin and two spots along 

 the sixth vein in the axillary cell, two in the discal along the fifth vein of which one 

 is near the middle and the other which is about four times as large is toward the base ; 

 third vein bare, small crossvein noticeably beyond middle of discal cell ; length, 3 mm. 



Habitat : Custer Co., Col. A male specimen collected by Pro- 

 fessor T. D. A. Cockerell. Type No. 4406, U. S. Nat. Musemii. 



Euaresta munda, sp. nov. 



Head and its members yellow, center of occiput grayish black, face not projecting 

 forward at the oral margin, antennae scarcely reaching halfway to the oral margin ; 

 body black, thorax and scutellum opaque, densely gray pruinose, the hairs yellow, 

 bristles brown, scutellum bearing two bristles ; abdomen polished, its hairs black, 

 ovipositor slightly convex, nearly as long as the last three segments of the abdomen ; 

 legs black, tarsi yellow, front tibiae yellowish brown ; wings dark brown, the follow- 

 ing spots hyaline : two in costal cell, three between apices of first and second veins, 

 the last two spots extending halfway across the submarginal cell, two between apices 

 of second and third veins, the second extending into the first posterior cell, one in 

 extreme apex of this cell, three between apices of fourth and fifth veins, the second 

 almost crossing the cell, the last one extending into the first posterior cell, three be- 

 tween apices of fifth and sixth veins, two on front side of sixth vein of which one is 

 beyond the middle of its last section and the other contiguous to the anal cell, three 

 marginal and one discal in the axillaiy cell, one in front part of discal cell midway 

 between the small and hind crossveins, finally one in posterior part of first basal cell 

 opposite middle of discal cell ; third vein bare, small crossveins near second third of 

 discal cell ; length, 3 mm. 



Habitat: Elko, Nev. 



A single female specimen. Type, No. 4407, U. S. Nat. Museum. 

 Euaresta mundula, sp. nov. 



Differs from the above description of munda only as follows : Pleura reddish 

 brown, apex of scutellum yellow, legs yellow, none of the hyaline spots between apices 

 of first and second veins extend into the submarginal cell, only two in axillarj' cell, 

 none in the discal ; length, 3 mm. 



Habitat : Pareah, Utah. 



A male specimen collected by Mr. A. L. Siler. Type No. 4408, 

 U. S. Nat. Museum. 



Trypeta acutangula Thomson is a synonym of Urellia abstersa Loew. 

 The latter belongs to Euaresta. 



