1918] Dipterous Genus Drapetis Meigen 199 



and ocellar bristles large, front beneath nearly as wide as the second 

 antennal joint, face very narrow, linear beneath, occipital orbits grayish, 

 cheeks broader behind where they are one-tenth the eye-height; palpi 

 brownish, with apical black hair, proboscis brown; antennae black, the 

 second joint with a long seta beneath, third joint broken. Four rows of 

 about nine acrostichals, no discal bristles, two scutellars; pleurae not 

 pollinose. Abdomen shining, nearly bare, hypopygium with very 

 sparse whitish hairs, the right lamella large, broad and deeply cleft. 

 Legs luteous, the hind coxa3, femora and metatarsi blackish, pubescence 

 whitish, anterior femora with a single preapical, the hind femora with 

 two preapical bristles, anterior tibias with a pair of apical spines, those of 

 the hind tibice small, its apical spur rather strong and pointed, no exten- 

 sor bristles on the tibiae, hind metatarsi not setulose. Halteres Avhitish. 

 Wings hyaline, veins pale brown, the fourth vein very slightly undulate, 

 apically parallel with the third vein, the second, third and fourth 

 sections of the costa proportioned 1.6 : 1.6 : 1, anterior cross- vein at 

 two-thirds the length of the second basal cell, outer sections of the 

 fourth vein proportioned 1 : 6, of the fifth vein equal, marginal cilia 

 uniformly very short. 



One specimen: Santa Cruz Mountains, California, received 

 from Professor R. W. Doane. 



Eudrapetis dorsiseta, sp. nov. 



9 . Length 2 mm. Shining black, the spur of the hind tibise and 

 the matted pubescence of the hind metatarsi brown. Second antennal 

 joint with a long seta beneath, third joint ovate, scarcely longer than 

 broad, the arista arising before the end of the third joint, slender, loosely 

 microscopically hairy, measuring three times the antennal length; face 

 linear, white-pollinose, clypeus shining, cheeks narrow in front, broad 

 behind, lower orbits white-pollinose. Dorsum of the thorax loosely 

 hairy, five hairs in the dorsocentral rows a little longer ; halteres yellow. 

 All the femora with a single preapical bristle, front tibiae with one strong 

 preapical flexor bristle, hind tibife with five erect extensor bristles which 

 in length are equal to the diameter of the tibiae but the apical one 

 longer, on the outer side with two short, strong, apical spines and on the 

 inner side with a strongly projecting, broad, blunted spur, hind metatarsi 

 somewhat swollen, not bristly except for one apical setula. Wings nar- 

 row, long, hyaline, the veins coarse and black, first vein ending at the 

 middle of the wing, the second, third and fourth sections of the costa 

 proportioned 3.5 : 3.7 : 1, third and fourth veins mutually converging 

 at the tip, anterior cross-vein at three-fifths the length of the second 

 basal cell, the outer two sections of the fourth vein proportioned 1 : 7, 

 of the fifth vein 4 : 3, margin with short cilia. 



One specimen: Juan Vinas, Costa Rica, collected by Dr. 

 P. P. Calvert for the Philadelphia Academy of Science. 



