532 PROCEEDINGS OF THE yATIONAL MUSEUM. vol. 44. 



POLYMERA HIRTICORNIS Fabricius. 



Chironomus hirticomis Fabricius, Syst. Antliar, 1805, p. -10.— Wiedemann, 



Dipt. Exot., vol. 1, 1821, p. 37, fig. 

 Polymera hirlicomis Wiedemann, Aues. Zweifl. Ins., 1828, vol. 1, p. 57. — 



Macquart, Suite k Buffon, vol. 1, 1834, p. 113. — Hunter, Trans. Amer. 



Ent. Soc, vol. 26, 1900, p. 292.— Kertesz, Catalogus Dipterorum, vol. 2, 



1902, p. 242.— Alexander, Psyche, 1911, p. 200. 



Male. — Length, 7.6 mm.; wing, 7 mm.; antenna, 8 mm. (about). 

 Head: rostrum and palpi, gense and occiput, orange-yellow; vertex 

 brown, the anterior portion paler yellowish ; front yeUow. Antennae, 

 basal segments, brownish-yellow, segment 3 dark brown, yellowish 

 basally, remaining segments bi-nodose, dark brown. 



Thorax: pronotum yellow; mesonotum: praescutum, anterior half 

 bright yellow with a brown spot in the middle at the cephalic end, 

 remainder of the prsescutum brown, much darker anteriorly near the 

 pseudosuture; scutum, scutellum and postnotum dark brown; 

 pseudosuture black. Pleurae: prothoracic, yellow; meso- and meta^ 

 pleurae dark brownish-black. Hal teres light brownish-white. Legs: 

 coxas and trochanters light yellow; femora light yellow, darkening to 

 form a brown subapical ring, a broad yellow apical band; tarsi 

 yellowish; the posterior pair white. 



Wings: brown with a broad pale yeUow band across the disk, 

 just distad of the cord and proximad of the fork of M3 and Cu,; a 

 pale yellow spot around Rs, and one at end of second A; costal cell 

 and base of wing light yeUow; veins brown, yellow where traversed 

 by the yellow markings. Venation: Sc very long, extending far 

 beyond the fork of Rs; cross-vein r far back from the tip of R, so 

 that Rj beyond r is only a little shorter than Rj between Scj and r; 

 R2+3 very short, less than the basal deflection of Cuj. Cu, -1-M3 

 much shorter than M3 alone; basal deflection of Cu, beyond the fork 

 of M. (See fig. 3.) 



Abdomen: tergum black, extreme tip of segments 2-5 brownish- 

 yellow; remainder entirely black; hyjjopygium orange-yellow; 

 sternum: segment 2, black; 3, tip orange; 4-6, orange-yellow; 7-8, 

 black. 



Igarape Assd, Parfi, Brazil, January 23, 1912 (coll. Parish). 



Specimen in Cornell ITniversity collection. 



POLYMERA NIVEITAKSIS, new species. 



Size, large; flagcllum of the antennaj almost simple; posterior tarsi, j 

 only, white; basal deflection of R^+s not evident; cell M, present. 



Male. — Length, 6.2 mm.; \\Tng, 7.3-7.4 mm.; antennae (about), 

 12.5 mm. Head: palpi brown; rostrum yellowish brown; antennae] 

 \vith the two basal segments and tlie proximal end of tlie third dull 

 3-eUow; remainder of the antennas dark brownish-black, clothed with 



