154 NORTH AMERICAN DTPTERA. 



DASYPOGONIN.*;, p. 54. 



2. Pulvilli nidimentary or wanting 2a 



Pulvilli normal. 2b 



2a. Claws very long, with an elongated tooth at the base of each; large 



species (Central and South America). . . Dicranus Loew. 



Claws normal. . Ablautus Loew. 



2b. Antennaj with a long, terminal arista (Cen. America and East Indies). 



Damalis Wiedemann. 

 Antenna3 not with a terminal arista. ...... 2c 



2c. Only four posterior cells present; front very broad above; very small 



species (Mexico) Townsendia Williston. 



Five posterior cells present as usual 3 



ASILINih:, p. 59. 

 4. Oviduct cylindrical, with a terminal circlet of spines. ... 4a 

 Oviduct laterally flattened, etc. .... Ekax Macquart. 



4a. Abdomen shorter than the wings. . . . Ecckitosia Schiner. 

 Abdomen longer than the wings. . . Pkoctacanthus Macquart. 



7. Oviduct laterally compressed. . 7a 



Oviduct conical. 14 



7a. Third antennal joint unusually hairy. . . Anarmostus Loew. 

 Third antennal joint not unusually hairy 8 



Neoplasta Coquillett, Proc. Nat. Mus. 1895, o9o (June, 1896. Same as 



Hemerodromia, but the discal and second basal cells united and the 



second posterior cell sessile. 

 Empimorpha Coquillett, 1. c. o98. "Same as Empis, except that the face 



is covered with long bristly hairs." 

 Neocota Coquillett, 1. c. 4o4. " Same as Rhamjihomijia, except that the 



face is thickly covered with long pile." 

 MiCROPHORCs Macquart, Dipt, du Nord, etc. 1827. Separated from Lcpto- 



peza and Orijdromia of the table by the third antennal joint being 



elongate, with a terminal style. 

 Meghyperus Loew, Stett. Ent. Zeit. 18-30, 303. Separated from Ili/hos 



and Si/ndipis of the table by the fourth longitudinal vein being 



furcate. 

 Paraiiydropii()ku.s Wheeler, Entoni. News, 180(), 185. "Closely allied to 



Scellus and Hijdrop/iorus, the $ distinguishable from the $ Hi/dro- 



phorus by the deep notch in the fore femora, the jirominent spur on 



the hind trochanter, anil the sti'ucture of the hypopygium. 



