OF WASHINGTON. 267 



Coloboneura nana, n. sp. 



Black, the legs and halteres yellow; front opaque, considerably nar 

 rowed anteriorly, antennae slightly over half as long as the arista, the 

 third joint oval and with a short prolongation at its apex, eyes widely 

 separated on the face; thorax opaque, gray pruinose; femora with a short 

 preapical bristle on the front side, middle and hind tibiae bearing several 

 rather long bristles; wings hyaline, marginal cell at apex of first vein 

 slightly wider than the submarginal at the same point, apex of third vein 

 nearly three times as far from apex of the second as from that of the fourth, 

 second basal cell slightly shorter than the first. Length, i mm. 



Four male specimens, collected at Lake Worth, Florida, by 

 Mrs. Annie T. Slosson. 



Type. No. 6776, U. S. National Museum. 



Tachypeza pruinosa, n. sp. 



Near rostrata, but the mesonotum more densely pruinose, that on the 

 front end and sides bluish gray, encroaching considerably on the upper 

 part of the prcpleura and mesopleura. Head black, front only slightlv 

 narrowed anteriorly, eyes widely separated above the antennae, contiguous 

 for a considerable distance over the face, antennae reddish yellow, about 

 one-fourth as long as the style, the third joint oval, palpi yellow, pro 

 boscis reddish yellow; body black; legs brown, the coxae, front and 

 middle tarsi except the last joint, also base of hind tarsi and ends of hind 

 femora narrowly, yellow, first two pairs of femora more yellowish brown, 

 their tibiae with a yellow vitta on the outer side; front femora greatly 

 thickened, without spinules on the under side, middle femora slightly thick 

 ened, the under side with minute spinules and with a rather long hair at the 

 base, inner side of first two pairs of tibias and under side of first joint of 

 their tarsi bearing many spinules, middle tibiae without apical spurs; 

 halteres yellow; wings grayish hyaline, submarginal cell above small 

 crossvein slightly wider than the marginal at the same point, apex of 

 third vein nearly twice as far from apex of second as from that of the 

 fourth, small crossvein oblique, about its length before apex of second 

 basal cell, crossvein at apex of this cell perpendicular. Length, 3.5 mm. 

 A female specimen collected at Atherton, Missouri, April 30, 

 by Mr. C. F. Adams. 



" Type. No. 6777, U. S. National Museum. 



CEdalea pruinosa, n. sp. 



Head black, front and face polished, antennae dark brown, the third 

 joint four times as long as wide, gradually tapering toward the apex, 

 about eight times as long as the style, proboscis black, the labella yel 

 lowish ; thorax black, somewhat opaque, thinly grayish pruino&e, a 

 polished streak above the middle coxae, scutellum bearing four bristles; 

 abdomen brownish yellow: legs, including the coxce, vellow, the apical 

 portion of the hind tibia; brownish, tarsi toward their apices brown ; wings 



