38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.83 



(21) PARADIDYMA BRASILIANA, new species 



Male. — Front moderately wide, at vertex 0.29 of the head width 

 in one specimen ; paraf rentals covered with gray pollen tinged with 

 yellow along the inner margins; parafacials, cheeks, and posterior 

 orbits cinereous; third antennal segment largely black, the base 

 yellow to the insertion of the arista. Sides of postnotum beneath 

 calypters with a few small inconspicuous hairs. Abdomen slender, 

 tapering to a rather narrow apex ; first segment conspicuously gray 

 pollinose on the sides above, second almost entirely covered with 

 changeable gray pollen, third and fourth shining black on apical 

 third to half; genital segments black, small and retracted. Other- 

 wise as in P. singularis. 



Length. — 7 mm. 



Female. — Unknown. 



Type.— Mvile, U.S.N.M. no. 44771. 



Remarks. — Described from one male specimen collected at Itaqua- 

 quecetuba, Sao Paulo. Brazil, September 26, by Dr. C. H. T. 

 Townsend. 



I am unable to note any structural differences between the present 

 species and P. singularis; both have the third antennal segment 

 strikingly elongated with the anterior margin concave below the 

 insertion of the arista. The rather slight characters separating the 

 species are mentioned above and in the key. A second closely related 

 species is P. peruana, known only in the female; it differs from 

 hrasiliana in having the cheeks distinctly narrower, the wings and 

 calypters obviously tinged with yellow, and apical cell barely closed 

 at costa. 



(22) PARADmYMA SINGULARIS (Townsend) 



Atrophopoda singularis Townsend, Trans. Amer. Ent. Soc, vol. 18, p. 373, 1891. 



Lachnomma magnicarnis Townsend, Trans. Amer. Ent. Soc, vol. 19, p. 103, 1892. 



Paradidyma singularis Coquillett, Revision of the Tachinidae of America, 



p. 126, 3897. — .^XDl:ICH, Catalogue of North American Diptern, p. 174, 1905. 



Male. — Front at vertex 0.306 of the head width (five measured as 

 follows: 0.31; 0.31; 0.3; 0.3; 0.31), rather prominent at antennae; 

 parafrontals, parafacials, and cheeks cinereous pollinose; face long 

 and deeply excavated, its ridges weakly divergent downward, bear- 

 ing a few bristles and hairs on lower extremity; antennae strikingly 

 elongate, first segment longer than second and extending consider- 

 ably above level of the front, third segment black, about equal the 

 length of face with the front edge concave below insertion of arista; 

 the latter thickened on proximal three-fourths; cheek two-fifths the 

 eye height; parafacial bare outside the main row of bristles; palpi 

 yellow; eyes distinctly hairy. 



