50 PROCEEDINGS OF THE NATIONAL MUSEUM vol.79 



sometimes a pair present; third bearing a marginal row of 1'2 to 14, 

 large; fourth covered with erect hairs in front, bearing numerous 

 bristles on sides near apex besides a marginal row; venter with 

 sharply defined patches of matted glossy-black hairs; genitalia small, 

 retracted ; the united inner forceps keeled behind tapering from base 

 to apex, which is shallowly notched ; outer forceps yellow, about two- 

 thirds as long as inner ones, not much narrowed before the evenly 

 rounded tips, outer side bearing fine pale hairs. 



Legs black ; mid tibiae with one large median anterior bristle ; hind 

 tibiae ciliate ; claws and pul villi longer than last tarsal joint. 



Wings distinctly brown on anterior margin, this color extending 

 rather faintly backward into the first posterior and discal cells, paler 

 behind ; fourth vein with an oblique bend ending in costa well before 

 apex of wing; costal spine minute; third vein bearing two or three 

 hairs at base. 



Female. — Front 0.29 of the head width (average of five: 0.3; 0.29; 

 0.27; 0.3; 0.29) ; ocellars strong; two pairs of verticals and orbitals, 

 large ; two uppermost f rontals stout and reclinate ; claws and pulvilli 

 minute, apical joint of fore tarsi conspicuously swollen and approxi- 

 mating the combined length of three preceding joints; hind tibiae 

 with one longer bristle in the outer posterior row ; abdomen usually 

 more reddish on sides than in male, second segment with one pair of 

 large median marginals, fourth with a marginal and a subdiscal row. 



Length, 7 to 11 mm. 



Type. — In the Zoological Museum, Copenhagen, Denmark, 



Kedescribed from numerous specimens of both sexes in the United 

 States National Museum, including 2 males labeled " cotypes Exorista 

 latimana van der Wulp " ; 1 female para type B.einwiasi'poda hrasi- 

 liensis Townsend ; 2 males and 1 female determined Masipoda gemi- 

 nata by Brauer and Bergenstamm ; 1 male labeled " Masipoda 

 geminata comp. type, J. M. Aldrich " ; and 1 male labeled " type 

 Tachina pyrrhopyga Wiedemann," received for study from the 

 Vienna Museum. Distribution records : Teapa, Tabasco, Mexico (H. 

 H. Smith) ; Sao Paulo, Brazil (C. H. T. Townsend) ; San Mateo, 

 Costa Rica (Pablo Schild) ; Posorja, Ecuador (F. Campos) ; Quiri- 

 gua, Guatemala (J. M. Aldrich) ; Ancon, Canal Zone (C. T. Greene) ; 

 Las Cascadas, Canal Zone (A. H. Jennings) ; Campinas, Brazil (F. 

 X. Williams) ; R. Charape and Yahuarmayo, Peru (C. H. T. Town- 

 send) ; Coban, Alta Vera Paz, Guatemala (J. M. Aldrich) ; La Provi- 

 dencia, Obispo, Guatemala (C. M. Rouillard, J. M. Aldrich) ; Maya- 

 guez, Porto Rico (R. H. Van Zwalenburg) ; Rurrenabaque, Beni, 

 Bolivia (Wm. M. Mann, Mulford Exploration) ; Catamarca, Argen- 

 tina (Kisliuk) ; Taboga Island and Alhajuelo, Panama (A. Busck) ; 

 iind Barro Colorado Island, Canal Zone (C. T. Greene). 



