690 N. C. AGR. EXP. STA. BUL. 239 
Holotype female, Rio Santiago, Peru, September 23, 1924, H. Bassler col- 
lection, Accession No. 33591; two males from Mandos and Olivenca, 
Amazonas, Brazil, October 1945 and July 1932 respectively (AMNH). One 
male, Rio Negro, Brazil (CAS). 
If I have correctly associated the sexes, the male genitalia of 7. riparia, n. 
sp., are identical to those of 7. serville: (Signoret). The new species differs from 
the latter in that the abdominal sternum VII of the female is more broadly 
produced posteriorly, in that the toothed portion of its second valvulae is 
much less extensive (it occupies almost the whole length of the valvulae be- 
yond the basal curvature in serville:), in its blunt apex of the second valvula 
(acute in serville:), in its separate sclerites in the genital chamber of the fe- 
male (absent in serviller) and in the diagonally truncate bases of the first valvu- 
lae in ventral view (more produced and rounded in servillet). 

561q 
561p 
Q 562e 
562f 
FIGURES 561, 562.—561, Jakrama riparia, n. sp., holotype; p, Bases of first 
valvulae from ventral view; q, first valvifer from lateral view. 562, J. eureta, n. 
sp., holotype. 
