1921] NATURAL SCIENCES OF PHILADELPHIA. 77 



Habitat. — Brazil. 



Holotype, 9 , Teffe, January 12, 1920 (H. S. Parish). 



Genus GONOMYIA Meigen. 

 1818. Gonomyia Meigen, Syst. Beschr., Bd. 1, p. 146. 



The genus Gonomyia is one of the characteristic TipuHd genera 

 throughout the tropics of the New World. Species of the sub- 

 genus Leiponeura Skuse are especially abundant in the Amazonian 

 Region. 



Gonomyia (Progonomyia) parsensis Alexander. 



1920. Gonomijia {Gonoinijdla) paroensis Alexander, Journ. N. Y. Ent. Soc, 

 vol. 28, pp. 7, 8. 



The types were taken at Prata, Brazil, June 30, 1919 (H. S. 

 Parish). 



The name Progonomyia is a re-naming of Gonomyella Alexander. 



Gonomyia (Leiponeura) pleuralis (AVilliston) 



1896. Atarha ■pleuralis Williston, Trans. Ent. Soc. Lond., 1896, p. 289. 



Manaos, Brazil, October 31-November 4, 1919 (H. S. Parish). 

 Flores, Brazil, November 10, 1919 (H. S. Parish). 



Gonomyia (Leiponeura) amazona Alexander. 



1912. . Gonomyia {Leiponeura) amazona Alexander, Ent. News, vol. 23, 

 pp. 418-420. 



Napo River, Peru, June 15, 1920 (H. S. Parish). 



The male hypopygium was described and figured by the writer 

 at the time of the original characterization of the species. The 

 details of the pleurites and appendages are not clearly indicated 

 there and may be further discussed as follows : 



Outer lateral angle of the pleurite produced into a large, fleshy 

 cyhndrical lobe; two pleural appendages, the ventral appendage 

 small, chitinized, appearing as a small blackened cylinder with the 

 tip narrowly split, at the base with an acute blackened spine; dorsal 

 pleural appendage fleshy, much larger than the chitinized append- 

 age, before the tip with a small acute spine, at the tip with two 

 powerful bristles; proximal face with about a dozen additional 

 bristles. 



Gonomyia (Leiponeura) acuminata sp. n. Plate IV, fig. l. 



Belongs to the cinerea group; antennal flagellum orange-yellow 

 on the basal half; head yellow with a brown vertical mark; thoracic 

 pleura with a conspicuous longitudinal yellow stripe; wings with 

 Sc short ; male hypopygium with four pleural appendages, the longest 

 acuminate, bearing a long, acute spine a short distance beyond 

 the base. 



Male. — Length about 3.8 mm.; wing 3.7 mm. 



