38 THOMAS SAY FOUNDATIOX 



bent forward than in occidua; claspers as in that spe- 

 cies ; jDenis with the tubular central part more swollen 

 and shorter, and the terminal process much larger. 

 Fifth sternite only showing on the middle, apparent- 

 ly undivided, with black short brush. 



Legs black, femora rather stout; middle femora 

 without combs, middle tibia with an irregular row of 

 bristles on outer front side, one of which is large; 

 hind tibiae without villositv. Front tibiae and tarsi 

 with peculiar erect hairs forming a fringe on the 

 upper and outer side, the tarsi a little swollen and the 

 segments somewhat shortened, the claws and pulvilli 

 shorter tlian in the other tarsi. 



Wing hyaline; veins yellow toward base, third 

 with hairs almost to small crossv^ein; a small costal 

 spine; third costal segment half as long as fifth. 



Female. Front .369 of head (average of two, — 

 .361 and .376). Genital segment black, retracted. 

 Front tarsi normal. 



Length, 5 to 6 mm. 



Two males, two females, Nassau, Bahamas, Dec. 

 11 and 14, 1912 (F. Knab), from the National Mu- 

 seum. 



Type. — In the Imperial Museum, Vienna. 



The females appear to be indistinguishable from 

 those of the following variety; they are merely asso- 

 ciated from being collected together. As Schiner 

 descrilied only females originally, tlie identification 

 depends on Brauer and a^ou Bergenstamm, who de- 

 scrilied the fringes of the male front tarsi. Schiner's 

 description of the pollen as yellowish in color would 

 make the identification very doubtful if Brauer and 

 von Bergenstamm had not had his types for com- 

 parison. Possibly Schiner was misled bv the wide 

 front and orbital bristles, and overlooked some males 

 in his material. 



