322 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



CHAETONODEXODES RAFAELI, new species. 



Length of body, 5.5 mm.; of wing, 5.5 mm. One male, San 

 Rafael, Vera Ci-uz, Mexico, March 23, 1896 (Townsend). 



Brown to dark brown. Parafrontals, face, cheeks, and orbits ashy 

 pollinose. Frontalia velvety dark brown. Thorax and scutellmn 

 blackish; the hmneri, in-egular hind border of presutural area, and 

 broad disk of postsutural area brassy-cinereous; pleurae ashy. Abdo- 

 men faintly ashy on narrow bases of last three segments; rest of ter- 

 gum rather dark brown, the venter and legs rather lighter. Wiags 

 faintly smoky tlu-oughout, the tegulae pale smoky-yellowish. 



Holotype.—lSio. 20051, U.S.N.M. 



Family RHODOGYNIDAE. 



Genus EUTHEROPSIS Townsend. 



Eutheropsis Townsend, Ent. News, vol. 27, 1916, p. 178. 



Genotype. — Euthera mannii Mik, 1889, Wion. Ent. Zeit., vol. 8, 

 p. 132, fig. 



Differs from Euthera as follows: Second antennal joint not so 

 elongate, the thud joint over twice to nearly tliree times as long as 

 second. Basal arista! joints distinct. Parafacials pilose. Facial 

 carina sharp, acute, very prominent. Epistoma very prominent. 

 Palpi clavate. Female with two proclinate orbitals. Male claws 

 short. Female front tarsi flattened. Apical cell short-petiolate, 

 ending far before wing apex. Alulae of wings very large, elliptical. 



Genus GEROCYPTERA Townsend. 



Gerocyptera Townsend, Ent. News, vol. 27, 1916, p. 178. 



Genotype. — TricJioprosopa marginalis Walker, 1861, Journ. Proc. 

 Limi. Soo. (London), vol. 5, p. 157. 



For characters see Austen,^ and the original description by Walker.^ 



FORMICOPHANIA, new genus. 



Genotype. — FormicopJiania elegans, new species. 



Differs from Orectocera as follows : Male. Much more slender, with 

 petiolate abdomen. Cheeks narrower, about one-fourth eye-height. 

 Vertex distinctly narrower. Facialia without sign of bristlets. Two 

 sternopleurals. Two lateral scutellars, and a decussate apical pair; 

 no discals. First two abdominal segments narrowed, second widen- 

 ing a little posteriorly, third ^videning from second, the fourth 

 widest, the fifth narrowing rapidly behind. Aside from the narrowed 

 basal part, the abdomen is strikingly swoUen-suboval in form, the 

 ventral profile nearly straight, the tergal profile very convex. The 



•Ann. Mag. Nat. Hist., ser. 7, vol. 19, p. 346. "^ Jcurn. Proc. Linn. Soc. (London), vol. 5, p. l.')7. 



