1921"! NATURAL SCIENCES OF PHILADELPHIA. 71 



Erioptera (Mesocyphona) bicinctipes Alexander. 



1913. Eriopkra bicinctipes Alexander, Proc. U. S. Nat. Mus., vol. 44, 

 pp. 519, 520. 



The types were from Igarape Assu, Brazil, January 25 to Febru- 

 ary 7, 1912 (H. S. Parish). The following additional records are 

 now available: 



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



Itacoatiara, Brazil, October 24, 1919 (H. S. Parish). 



Flores, Brazil, November 19, 1919 (H. S. Parish). 



Teffe, Brazil, December 22, 1919 (H. S. Parish). 



Iquitos, Peru, March, 1920 (H. S. Parish). 



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



Napo River, Peru, June 6, 1920 (H. S. Parish). 



Erioptera (Mesocsrphonat diffusa sp. n. 



Related to E. eiseni Alexander; coloration of the mesonotum 

 yellowish, without markings; wings pale brown with large, ill- 

 defined whitish subhyahne spots; tip of vein Mz lying free in the 

 membrane. 



Female. — Length 3.2 mm.; wing 2.9 mm. 



Head badly eaten by ants. Mesonotum yellow without darker 

 markings. Pleura light yellow with two narrow, rather ill-defined 

 brownish longitudinal stripes. Halteres broken. Legs with the 

 coxae and trochanters light yellow; femora pale brownish j-ellow, 

 the tips conspicuously golden yellow; a broad but ill-defined brown 

 subapical ring; sometimes there is a second dark ring near mid- 

 length of the segment; remainder of the legs yellow\ Wings broad, 

 the costal region brown, the remainder of the membrane rather 

 pale yellowish brown, with about sixteen whitish subhyaline spots 

 arranged as follows: at arculus, at origin of Rs, at Sc^, along the 

 cord and about ten at the apices of the cells between the ends of 

 the longitudinal veins; veins pale yellow. Venation: tip of vein 

 Mi lying free in the membrane, its basal connection with M1+2 

 lost by atrophy; tip of vein 2nd A curved strongly toward the wing- 

 tip. Abdomen brownish yellow, the sternites paler. Ovipositor 

 with the valves long and slender, the tergal valves acute at their 

 tips. 



Habitat . — Brazil. 



Holotype, 9 , Teffe, December 23, 1919 (H. S. Parish). 



Erioptera (Mesocyphona) invariegata sp. n. 



General coloration uniformly dark brown, this color including 

 the legs; wings uniformly brownish gray. 



Female. — Length about 2.5 mm.; wing 2.9 mm. 



Rostrum and palpi dark brown. Antennae dark brown, the 

 flageUar segments cylindrical. Head dark brown. Thorax dark 



