47 



Male. — Both antennae in the only specimen are broken off toward 

 their apices, but were evidently almost twice as long as the bead and 

 body taken together, apparently fifteen -join ted (2 + 13); first joint 

 slightly longer than wide, the second as wide as long, each of the remain- 

 ing joints suddenly contracted into a petiole before the middle and 

 again at the apex of each, the narrowed portions longer than the thick- 

 ened pait at their bases, the latter at the base of each joint bears a 

 whorl of bristly hairs, that near the middle of each joint bears two 

 whorls, one with few hairs at its base, the other with many more hairs 

 at its apex; the last joint is nearly twice as long as those near the mid- 

 dle of the antenna, and the second thickened portion is greatly con- 

 stricted at the middle, four times as long as the thickening at the base 

 of the joint, terminating in a slender process which is almost one-half 

 as long as the thickened portion. The fifth vein at the point where it 

 forks is nearer to the hind margin of the wing than it is to the third 

 vein, and the latter opposite this point is much nearer to the costa than 

 to the fifth vein. Third tarsal joint slightly longer than the fourth and 

 fifth taken together. Colors as in the female. Length 1.5 mm . 



The specimens bred by Mr. Dorsett belong to a new genus, differing 

 from all others by the much smaller numbers of antennal joints, and 

 both the genus and species are characterized herewith. 



Neocerata rhodophaga new genus and species. 



Antennae in both sexes slightly shorter than the head and thorax 

 taken together, nine-jointed; joint 1 obconical, 2 globular, wider 

 than auy of the others; joints 3 to 8 only slightly longer than wide, 

 subsessile, the hairs very sparse, not arranged in whorls; joint 9 almost 

 twice as long as 8, slightly constricted near the middle. Wings hyaline, 

 bare except along the hind margin near the base and on the veins, 

 which are sparsely bristly, rather densely bristly along the first half of 

 the costa, interspersed with flattened bristles: the first vein lies very 

 close to the costa, which it joins slightly before the middle of the wing; 

 third vein evenly arcuate, joining the costa far before the extreme 

 apex of the wing, this distance almost equaling one-half of the great- 

 est width of the wing, the extreme base of this vein, where it joins the 

 first vein, very indistinct; fifth vein indistinct toward its apex, forked 

 at its last fourth, the anterior fork reaching the hind margin a short 

 distance basally of the tip of the third vein. First tarsal joint less 

 than one-half as long as the second, claws of tarsi simple. Color of 

 alcoholic specimens yellow, the head and thorax tinged with brown. 

 Length, 1 to 1.25 mm . 



Nine males and three females, bred November 4, 189(3, by Mr. P. H. 

 Dorsett. 



This fly is shown in fig. 27 highly magnified, the antenna still more 

 enlarged at the left. The hair lines below show the actual size of the 

 fly. 



The larva of this species is at present unknown to the writer. 



