352 CHARLES T. BRUES. 



vein present; anal angle of the wing with a series of bristles. Ovipositor of 

 female retractile, not heavily chitinized or spear-shaped. Legs usually with bris- 

 tles on the outer side of all the tibiae before the apex, generally one on the fore 

 tibia, two on the middle, and one, two or none on the hind tibia. Pul villi and 

 empodia distinct. 



All the species which I have included in the present genus are 

 considered by Becker as belonging to Phora, but all are very distinct 

 by the characters enumerated above. The species also differ in hab- 

 itus, being of more robust form and with stouter hind legs. 



I have adopted the name Hijpocera, although when described by 

 Lioy it was improperly characterized. His various types, however, 

 seem all to belong here, so I have modified the diagnosis as shown 

 above. 



TABLE OF NORTH AMERICAN SPECIES. 



1. Antennae with the third joint oval as usual, last joint of front tarsi not 



enlarged 2. 



Third antennal joint long and pointed, last joint of front tarsi flattened and 

 enlarged, vertex semicircularly elevated in the male. 



1. jolmsoni sp. nov. 



2. Fourth vein evenly curved throughout, gradually and evenly divergent from 



the fifth, small species 6. grenadensis sp. nov. 



Fourth vein more strongly flexed at the base than at the apex, halteres 

 black 3. 



3. Hind tibiae with a bristle on outer side just before the middle 4. 



Hind tibiae without a bristle externally, but on whole outer side covered with 



transverse rows of flat black hairs 2. ehrmanni sp. nov. 



4. Antennae, palpi and proboscis black, third longitudinal vein finely hairy for its 



entire length 3. i'emorata Meig. 



Pnlpi and proboscis yellow 5. 



5. Wings hyaline, the third vein clavate at its tip, antennae reddish yellow. 



4. clavala Lw. 

 Wings strongly infuscated, third vein scarcely enlarged at apex, antenna; red- 

 dish brown or piceous 5. mordel laria Fall. 



Hypocera Johnson i sp. nov. (Plate vi, figs. 18, 19.) 

 Male. Black, except antennae and palpi, which are orange yellow, and front 

 legs, which are brownish. Head black, front shining, evenly and rather sparsely 

 coarsely punctate throughout. Two anterior frontal bristles stout, reclinate, 

 next row above consisting only of the two lateral bristles, the median ones being 

 absent; next row of four bristles arranged in a straight line; vertex as in the 

 male of coronata Becker, — i. e., semicircularly elevated and very sharp above ; 

 ocellar tubercle present, although not elevated so far as in coronata. Antennae 

 long, oval and acuminate toward the tips, equal in length to the eye height and 

 arcuate, bright orange yellow, glistening in certain lights. Arista apical or very 

 nearly so, no longer than the. third joint, whitish pubescent. Palpi small, flat- 

 tened, strongly setose. Cheeks with a single bristle; infraocular cilia long, but 



