1921] NATURAL SCIENCES OF PHILADELPHIA. 67 



Polymera superba Alexander. 



1913. PoUjmera superba Alexander, Proc. U. S. Nat. Mus., vol. 44, pp. 

 530, 531. 



Igarape Assii, Brazil, January 24, 1912 (H. S. Parish). 

 Teffe, Brazil, December 24-26, 1919 (H. S. Parish). 



Polymera niveitarsis Alexander. 



1913. Polymera niveitarsis Alexander, Proc. U. S. Nat. Mus., vol. 44, 

 pp. 532, 533. 



Igarape Assii, Brazil, January 29, 1912 (H. S. Parish). 



Prata, Brazil, June 30, 1919 (H. S. Parish). 



Iquitos, Peru, May 11-15, 1920 (H. S. Parish). 



Yurimaguas, Peru, April 7-10, 1920 (H. S. Parish). 

 Pol3rmera crystalloptera sp. n. 



Close to P. niveitarsis Alexander; wings crystaUine hyaline; r 

 close to the tip of R^.; r-m before the fork of Rs. 



Male. — Length 7.5-8.5 mm.; wing 6.5-7.5 mm. 



Rostrum and palpi orange-yellow. Antennae of the male elon- 

 gate, approximately as long as the body; scapal segments tumid, 

 brownish orange; flagellar segments black, in structure quite as in 

 P. niveitarsis, elongate-cylindrical, not constricted, provided with 

 abundant. erect black hairs. Head dark brown. Mesonotal prae- 

 scutum reddish yellow with a broad reddish brown median stripe 

 that is sometimes obliterated; scutum and scutellum reddish brown, 

 the postnotum slightly paler. Pleura obscure reddish yellow. Hal- 

 teres brown. Legs with the coxae and trochanters obscure yellow; 

 femora dark brown, paler basally; tibiae and tarsi dark brown, 

 posterior metatarsi with the apical half snowy white; remaining 

 tarsal segments similar, only the terminal segment infuscated. 

 Wings crystalline hyaline, highly iridescent; veins very conspicuous, 

 brownish black. Venation: Arculus interrupted; r far out near 

 the tip of Ri, the distal section of the latter vein from one to two 

 times r; r-m connecting Rs immediately before the fork; basal de- 

 flection of Cui before the fork of M, the distance about equal to r; 

 cell Ml small, vein Mi being about equal to or shorter than the 

 basal deflection of Cui; petiole of cell M^ about two-thirds to three- 

 fourths the cell. Abdominal tergites dark brown; basal sternites 

 yellowish, becoming more obscure toward the tip of the organ; 

 hypopygium pale brown, the appendages black. 



Habitat. — Peru. 



Holotype, cf, Yurimaguas, April 2, 1920 (H. S. Parish), 



Paratopotype, cf , April 8, 1920. 



Genus PENTHOPTERA Schiner. 

 1863. Penthoptera Schiner, Wien. Ent. Monatsch., vol. 220. 



Penthoptera batesi sp. n. 



Antennae of the male rather short; general coloration reddish 

 yellow, the pleura testaceous yellow; tarsi white, this color including 



