474 PROCEEDINGS OF THE NATIONAL MUSEUM vol. u4 



apicomesal pointed projection. Male genitalia (fig. 8,6): Ninth seg- 

 ment almost cii'cular in lateral aspect; tenth tergum declivous, in 

 dorsal aspect broadly and deeply excavate mesally, with lateral flap- 

 like extensions and wdtli a ventromesal projection; dorsal process of 

 aedeagus sharpl}'' upcm'ved from near base, tapering to a sharp point, 

 lateral processes arising near middle of aedeagus and divided into 2 

 rods, basal one directed more laterally, apical one more posteriorly; 

 aedeagus with a pair of divergent apicomesal spines arising on upper 

 surface; ventrad to aedeagus a pair of short rods basally, and a large 

 structure developed into a pair of slender divergent apical rods. 



Holotype cT, paratypes 14 cf : Peru: Rio Pichis, Puerto Bermudez, 

 July 15, 1920, Cornell University Expedition lot 569, sub 255 (CU 

 Type 3893). 



Mexitrichia elongata, new species 



Figure 8,e 



M. elongata is related to M. meralda Mosely which is known from 

 Mexico. The two are very similar in the shape of the tenth tergum, 

 the dorsal process of the aedeagus, and the elongate lateral processes 

 of the aedeagus. However, elongata is easily recognized by the pres- 

 ence of a spine in the aedeagus and by the paired processes ventrad 

 to the aedeagus. 



Adult. — Length of forewing 4 mm. Color bro\vn; wings clothed 

 with golden brown hairs, with a pale streak in the membrane at the 

 anastamosis. Venation is figm'ed by Mosely (1954, fig. 80), for 

 M. rancura. Sixth sternum with a short apicomesal process. Male 

 genitalia (fig. 8,e): Ninth segment somewhat oblique, anterior margin 

 rounded, posterior very sinuate; tenth tergum with an apicodorsal 

 point and a pair of apicolateral arms separated by a U-shaped mesal 

 incision; dorsal process of aedeagus uptmiied near apex, which is 

 pointed, lateral process of aedeagus very long, decurved near mid- 

 length, widened before apex, v.dth a sharp apicodorsal point; aedeagus 

 with a single apicodorsal spine, ventrally wdth a dai'k obscure basal 

 structure, at midlength with a pair of processes each bearing a de- 

 curved twisted filament apically. 



Holotype cf, paratype cf : Colombia: Valle, Tablones, Finca la 

 Florida, 1300 m., Jan. 7, 1959, J. F. G. Clarke (USNM Type 66022). 



Mexitrichia teutonia Mosely 



Mexitrichia teutonia Mosely, Novitates Zoologicae, vol. 41, p. 223, 1939. 



The type locality of this species is Brazil. I have seen additional 

 specimens from Brazil. 



