630 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49. 



PELETERIOPSIS, new genus. 



Genotype. — Echinomyia jlaviventris Wulp, Biol. Centr.-Amer. Dipt., 

 vol. 2, 1888, p. 32. 



Differs from Peleteria as follows: Form stouter, abdomen much 

 broadened. Cheeks distinctly less than eye-height. Parafacials 

 much less than eye-width. Three or four strong prochnate fronto- 

 orbitals in female, two in male. Palpi not so slender-filiform, more 

 curved at tip, shorter. First two aristal joints elongate. Abdom- 

 inal macrochaetae spinelike, erect. Second segment with four 

 closely-placed median marginal macrochaetae. Anal segment bare 

 of macrochaetae on less than front half. Small crossvein on middle 

 of discal cell. Cubitus very much nearer to hind than to front margin 

 of wing. 



Note. — One female, head of Rio Piedras Verdes, Sierra Madre of 

 Chihuahua, Mexico, about 7,300 feet, August 19, 1899 (TowTisend); 

 and one male, Rio Ruidoso, White Mountains of New Mexico, about 

 7,500 feet, August 3, 1898, on flowers of Solidago trinervata (Town- 

 send). These may constitute a subspecies. They differ from Wulp's 

 description mainly as follows: Whole face and cheeks pale golden. 

 Anal segment brown, the color invading the yellow on hind median 

 area of third segment. Wings hghtly smoky throughout, tegulae 

 yellowish-fuscous . 



PELETERIOPSIS TEGULATA, new species. 



Length of body, 13 to 13.5 mm.; of wing, 11.5 to 12 mm. Male 

 and female, head of Rio Piedras Verdes, Sierra Madre of Chihuahua, 

 Mexico, about 7,300 feet; the male July 15, 1899, on flowers of Rhus 

 glabra; the female August 17, 1899 (Townsend). 



Differs from the P. jlaviventris specimens above mentioned as fol- 

 lows: Second antennal joint wholly clear rufous. Palpi much 

 shorter. Tegulae white, with narrow brownish-yellow rims. Only 

 two median marginal macrochaetae on second segment. 



Holoty 2)6. —'No. 19427, U.S.N.M., female. Allotype, male. 



This form may be considered as representing subgenus B. 



Family RHODOGYNIDAE. 

 OCYPTEROPSIS, new genus. 



GenotyiJe. — Ocypterajlavifrons Macquart, Dipt. Exot. Suppl., vol. 4 

 (suite), 1851, p. 187, pi. 20, fig. 1. 



Differs from Cylindromyia as follows: Abdomen not cyUndrical, 

 gently but conspicuously broadening in middle from both base and tip. 

 Proboscis slender, the part below geniculation conspicuously longer 

 than lower border of head, pointed, labeUa not extruded laterally. 

 Front of male at vertex about two- thirds eye-width. Ai'ista slender, 



