534 PROCEEDINGS OF TUE XATIOSAL Mi SEUM. vol. 44. 



ments light yellow, tliis annulated effect most noticeable on segments 

 4-S; a group of wade, outspread hairs extending from each node. 

 Front, vertex and occiput grayish-brown, a black spot in the center 

 of the vertex. 



Thorax: dark brown; pseudo-sutural spots, deep, prominent, black; 

 pleurffi, brownish-black; the sternum nearly as dark; halteres light 

 brown, the laiob darker. Legs: coxas and trochanters hght yellow- 

 ish, basis of former, brown; femora brown, more yellowisli basally, 

 subapically somewhat darker bro'mi; tibite brown, tip dark; tarsus, 

 segment 1 Ught brown, tip wliitish; segments 2-4 white; 5 more 

 brownish. 



Wings: slightly tinged with gray. Venation: Sc ratlier long, Sc, 

 nearer to the fork of R,+3 than fork of Rs; R, beyond r about one- 

 third tlie distance of Rj between Scj and r. Basal deflection of R^+j 

 very long, twice as long as r-m; Mj-t-Cuj about equal to ^l^. Basal 

 deflection of Cu, beyond the fork of M. (See fig. 4.) 



Abdomen dark brown. 



HaMtat. — Eolotype. — Male,Igarape Assii, Parfi, Brazil, February 7, 

 1912 (Parish). 



Type. — In Cornell Urdversity collection. 



Differs from albitarsis Williston in tlie darker coloration througliout ; 

 Sc longer, extenduig much beyond the fork of Rs; basal deflection of 

 Cu, beyond the fork of M, not at it, etc. It comes close to fusca 

 Wiedemann, but differs in several details of coloration, and, if Wiede- 

 mann's figure represents true fusca, as I suppose it does, in vena- 

 tional and antennal characters. 



POLYMERA INORNATA, new species. 



Size, small; flagellar segments of the antennae bi-nodose; wing with 

 cell il, present ; 11, beyond r equal to R, between Scj and r. 



Male. — Length, 4.4 mm.; wing, 4.8 mm.; antenna (about), 6.5 mm. 

 Head: rostrum and palpi light brown; front, vertex, and occiput 

 dark brown, bloom destroyed by mucUage; antennal segments dark 

 bro\vn, somewhat paler at the base and apex of each segment, but 

 not producing an annulated effect. 



Thorax: notum light chestnut-brown; pleurae similar but paler, 

 without any distinct darker pleural stripe, sternal region dull yellow. 

 Halteres very pale yellow, the knob liglit brown. Legs: fore and 

 middle, onl}% remain; light yello\vish-brown, the coxae and trochan- 

 ters being more yellow; it is very probable that the posterior tarsi 

 are whitish. 



Wings imiformly tinged with j'eUow; veins brownish-yeUow. 

 Venation: Sc long, ending about opposite to the fork of R2+3; cross- 

 vein r far removed from the tip of R,, so that R, beyond this cross 

 vein is equal to that section of R, between Scj and cross-vein r; 



