62 PROCEEDINGS OF THE ACADEMY OF [Part I 



Ctenolimnophila decisa (Alexander) 



1914. Gnophomyia decisa Alexander, Trans. Am. Ent. Soc, vol. 40, pp. 

 245, 246. 



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



differs in a few minor points from typical decisa but with the scanty 



material available it is impossible to separate the species. 



Genus LIMNOPHILA Macquart. 

 1834. Limnophila Macquart, Suites a Buffon, Tome 1, Hist. Nat. Ins., 

 Dipt., p. 95. 



Limnophila (Limnophilella) epiphragmoides Alexander. 



1913. Limnophila epiphragmoides Alexander, Proc. U. S. Nat. Mus., vol. 44, 

 pp. 543, 544. 



Igarape Assu, Brazil, January 30, 1912 (H. S. Parish) ; Type. 



Limnophila diversipes sp. n. 



General coloration brownish yellow; legs brown, the tips of the 

 tibiae, bases and tips of the metatarsi and the remaining tarsal 

 segments white; wings petiolate, the anal angle practically lacking; 

 membrane hyahne, the tip slightly infuscated; petiole of cell Mi 

 very short; 2nd Anal cell long and narrow. 



Sexf — Wing 9 mm. 



Rostrum and palpi brown. Antennae broken. Head reddish 

 brown, more yellowish caudally and on the genae. Mesonotum 

 small, pale brownish yellow, unmarked. Pleura yellowish. Hal- 

 teres broken. Legs with the coxae testaceous yellow; trochanters 

 with a decided greenish tinge; femora brown; tibiae dark brown, 

 the tips broadly (2.4 mm.) and abruptly snowy white; metatarsi 

 brownish black, the extreme bases and the apical third to fifth 

 snowy white, this color most extensive on the posterior legs; re- 

 mainder of the tarsi white, the terminal segments tinged with green- 

 ish. Wings elongate, petiolate; anal angle practically lacking; mem- 

 brane hyaline, the apex beyond cell 1st Mi distinctly but faintly 

 infuscated; stigma very small, oval, brown; veins dark brown. All 

 the longitudinal veins beyond the cord with long, conspicuous macro- 

 trichiae; Rs, M, Cu and the Anal veins likewise with macrotrichiae, 

 smaller and more scattered toward the base of the wing. Venation: 

 Sc long, Sci extending to slightly beyond midlength of R2+3, Sc2 

 at the tip of Sci; Rs long, strongly angulated at origin; i?2+3 almost 

 in ahgnment with Rs, a little shorter than the distal section of R2; 

 r on 7^2 at about three-fifths its length and on i?i a little more than 

 its length from the tip; basal deflection of Ri + 5 short, strongly ar- 

 cuated, a little longer than the basal deflection of Cui; cell 1st Mi 

 long and narrow, rectangular; petiole of cell Mi very short, less 

 than m, cell Mx consequently very deep; basal deflection of Cui 

 about one-third its length beyond the fork of M; Cui approximately 

 four times the basal deflection of Cui; 2nd Anal vein long, running 

 close to and parallel with the anal margin of the wing so that cell 



