1921] NATURAL SCIENCES OF PHILADELPHIA. 65 



Rostrum and palpi dark brown. Antennae short, the scape and 

 first flagellar segment brownish yellow; remainder of the fiagellum 

 dark brown. Head brownish yellow, the dorso-median area of the 

 vertex darker brown. Mesonotal praescutmii brownish yellow with 

 three darker brown stripes; median stripe with the lateral margins 

 and a capillary median line still darker brown ; pseudosutm'al f oveae 

 conspicuous; scutum dark brown, the median area with a capillary 

 dark line; scutellum pale brownish testaceous with a narrow brown 

 median line; postnotum pale brown, the median line darker. Pleura 

 light brown, variegated with darker brown. Sternum light yellow- 

 ish brown. Halteres dark brown, the base of the stem paler. Legs 

 with the coxae light brown, dark brown basally; trochanters brown- 

 ish yellow; femora brownish yellow, a narrow (0.6 mm.) brownish 

 black subterminal ring, preceded by a broad but ill-defined yellow- 

 ish ring, the apex narrowly pale; tibiae light brown, the tip and 

 the slightly narrower base black; metatarsi light brown, the tips 

 dark brown; remainder of the tarsi dark brown. Wings with a 

 strong brownish yellow tinge; cell C brown, cell Sc yellowish; very 

 broad brown clouds at the base of cell R, origin and fork of Rs and 

 as conspicuous seams along the longitudinal veins, in cells M, 1st A 

 and 2nd A suffusing most of the cells; veins dark brown, darkest 

 in the clouded areas. Venation: vein Rn entirely lacking as in 

 P. ahnormis Alexander and P. hrevitihia Alexander; i?2+3 consider- 

 ably longer than the deflection of i?4-t-5; r-m longer than the basal 

 deflection of Mi+;; cell Mi considerably shorter than its petiole; 

 fusion of Cui and Mz slight; vein Cui longer than the basal deflec- 

 tion of 71/1+2; 2nd Anal vein rather long, ending a trifle before the 

 origin of Rs. Abdomen dark brown. Ovipositor with the valves 

 comparatively short, blackened basally; tergal valves gently up- 

 curved, their apices pale. 



Habitat. — Brazil. 



Holotype, 9 , Teffe, December 20, 1919 (H. S. Parish). 



Paratopotype, 9 , December 12, 1919. 



Psaronius mancus is readily told from all described species of the 

 genus by the diagnostic characters given above. Its only close 

 relative is P. hrevitihia Alexander, likewise from the Amazonian 

 Region. 



Psaronius brevitibia Alexander. 



1920. Psaronius brevitibia Alexander, Ent. News, vol. 31, p. 74. 



Still known only from the type specimen, taken at Obidos, Brazil, 

 August 28, 1919 (H. S. Parish). 



Genus POLYMERA Wiedemann. 

 1821. Polymera Wiedemann, Dipt. Exot., p. 40. 



Polymera includes nearly a score of species that are confined to 

 tropical and subtropical America. The genus is abundantly rep- 



