1921] NATURAL SCIENCES OF PHILADELPHIA. 89 



Rostrum and palpi brown. Antennae dark brown, the basal 

 scapal segment sparsely pruinose. Head pale brownish yellow. 

 Mesonotal praescutum reddish brown, with three rather ill-defined 

 darker brown stripes, confluent behind; scutum and scutellum dark 

 brown, the latter narrowly margined with pale; postnotum dark 

 brown, sparsely gray pruinose. Pleura reddish brown, the mes- 

 episternum darker brown. Halteres brown, the base of the stem 

 more yellowish. Legs with the coxae yellowish testaceous; troch- 

 anters brownish yellow, the posterior pair darker, the margins of 

 the trochanters narrowly chitinized; femora dark brown, only the 

 apices narrowly (0.7 mm.) brownish yellow; remainder of the legs 

 dark brown. Wings subhyahne; stigma subcircular, dark brown; 

 cell C yellowish; Sc yellow basally, thence passing into dark brown; 

 broad brown seams along Rs, Cu, the cord and outer end of cell 

 1st M2; a very faint brown tinge over the wing-apex, continued 

 basad in cell R^; veins dark brown. Venation: Sci longer than 

 r; Rs slightly angulated before midlength; r connecting with R2+3 

 and Ri, the tip of the latter a little greater than that section of 

 R2+3 beyond r; cell 1st Mi pentagonal, moderately long; vein Mz 

 beyond cell 1st M2 much longer than this cell; basal deflection of 

 Cui just before the fork of M; distance on wing -margin between 

 veins Cws and 1st A a httle more than one-half m. Abdomen dark 

 brown, the apical half of segments two to four broadly obscure red- 

 dish; ovipositor pale at the base; tergal valves rather short, deep 

 wine-brown in color, slightly upcurved, the tips acute. 



Habitat. — Brazil. 



Holotype, 9 , Teffe, December 24, 1919 (H. S. Parish). 

 Trentepohlia femorata is readily told from all described American 

 species of the genus by the coloration of the legs. 



Trentepohlia (Paramongoma) flavella sp. n. 



Sex? — Wing 3.4 mm. 



Related to T. (P.) pallida (Williston) but readily distinguished 

 by the following characters: Size very small, by far the smallest 

 American species of the genus as yet made known. Legs pale 

 throughout. Wings with a very strong grayish yellow tinge, the 

 costal region brighter yellow; veins conspicuous yellow; stigma in- 

 distinct, only slightly darker than the surrounding membrane; 

 macrotrichiae on the veins very sparse — a series on costa for its 

 entire length; a few on the end of Ri, others on M1+2 and others 

 scattered on various veins. Venation: Sc long, ending just before 

 the fork of Rs; Sci rather indistinct, slightly removed from the 

 tip of Sci; r near the tip of Ri, connecting with R2+3 beyond two- 

 thirds its length; cell 1st M2 large, longer than vein Ms beyond it; 

 m about one-half the outer deflection of M^; basal deflection of Cui 

 a short distance before the fork of M: Cui widely separated from 

 1st A at the wing-margin, this distance being approximately as 

 long as Cu2 alone; some of the veins are very faint and evidently in 



