238 



U.S. NATIONAL MUSEUM BULLETIN 261 



Figure 227, Tapajosa rubromargtnata (Signoret), from "Argentina": j, 

 aedeagxis, caudoventral view, dorsal apodeme not shown. 



4. Aedeagal processes with two subequal branches at apex, basal 



branches not recurved . . T. fulvopunctata (Signoret) (fig. 222) 



Aedeagal processes, if branched apically, with rami unequal and 



dissimilar, basal branches directed proximally 5 



5. Aedeagal processes strongly recurved apically. 



T. similis (Melichar) (fig. 226) 

 Aedeagal processes not so . T. rubromarginata (Signoret) (fig. 227) 



Tapajosa spinata, new species 



Figure 224 



Length of male 8.8-9.8 mm.; of female 10.9-1 1.2 mm. Head with fine 

 sparse pubescence on disc of crown. Thorax with dorsopleural carina 

 rectilinear. Male with aedeagal shaft short, broad, submeinbranous in 

 lateral aspect, narrow in posteroventral aspect, with a pair of basal 

 processes each of which is trifid at base, the two shorter rami barely 

 attaining apex of shaft, the longer ramus greatly exceeding it; style 

 without a preapical lobe, with two short angular anteapical teeth on 

 mesal margin; connective Y-shaped, the arms divergent but not long. 



