466 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



four on apical third very strong, curved, and widely placed; hind 

 tibiae with numerous strong hairs, those on antero-dorsal surface 

 strong, but not so markedly different from the others that it could be 

 placed in Group B, the postero-dorsal bristles (9-10) large and row 

 complete; wings yellowish, costa to fully "wang middle, first division 

 equal to second, third about one-fourth the length of second, costal 

 fringe very long and strong, its bristles equal in length to width of 

 basal costal cell; halteres dusky yellow. 



Length, 1^ mm. 



One female Mandrilla, Jamaica (T. D. A. Cockerell). 



Standing in collection as '^PJiora scalaris, Lw." 



Type.— Ceit. No. 14854, U.S.N.M. 



APmOCaETA RUFICORNIS, Meigen. 



Yellow; frons in female clear yellow, in male browned above, lower 

 post-antennal bristles less than half the size of the upper pair; third 

 joint of antennae in male large and oval, in female smaller, and not so 

 much darkened at tip, arista distinctly pubescent, palpi yellow, nor- 

 mal; thorax slightly darkened posteriorly; four equal sized scutellar 

 bristles; abdomen yellow, first segment with a narrow, preapical, 

 black band, the others with broad, lateral spots which suffuse nearly 

 the entire segments 2-4, segments 5-6 yellow on disk, second seg- 

 ment slightly elongate and dilated in male and in both sexes with 4 

 to 5 very long hair-like bristles laterally; legs yellow, hind femora 

 blackened at tips, and ciliated with hairs on the apical third of their 

 ventral surfaces ; bristles on mid tibiae weak, those on hind tibiae weak 

 at base but rapidly increasing in size to beyond middle then abruptly 

 ceasing, very long and widely placed, the apical third occupied by 4 

 to 5 very small setulae and one long bristle at apex; wings 3^ellowish, 

 veins brown, costa to beyond middle, first division shorter than 

 second, first vein joining the costa at an obtuse angle, third division 

 about one-fourth the length of second, halteres yellow. 



Length, 3^ mm. 



There are two specimens (male and female) from Franconia, New 

 Hampshire (Mrs. Slosson), and one male from Plummers Island, 

 Maryland (A. K. Fisher), which I am unable to separate from the 

 European species except by colojr. In this group color is an xmsatis- 

 factory character to base a specific distinction upon and I prefer to 

 consider this species as identical with that of the European fauna, 

 which in Britain varies from yellowish to black, and would probably 

 be much more prone to vary to the lighter forms in this country. I 

 have also seen one female of this species from Ithaca, New York (O. 

 A. Johannsen), and one female from Delaware Water Gap, New Jersey, 

 July 12. (This last is in the collection, but there is no collector's 

 name on it.) 



