90 
Psyche 
[June- Sept. 
and extensible behind the usual basal tergal sclerite; post- 
eriorly one finds on the extreme sides two pairs of subapical 
strongly sclerotized plates, bearing long bristles, the ante- 
rior pair being much larger than the posterior pair. In the 
male there is immediately behind the basal tergal sclerite a 
large ribbon-like median plate, somewhat triangular medial- 
ly; much farther back, also a pair of very small median 
plates, rather far apart; two pairs of subapical plates are 
present, but the posterior pair are very small and hidden 
from view in a dorsal aspect. The abdomen is fairly cor- 
rectly drawn for both sexes by Massonnat (1909, Ann. Univ. 
Lyon, N.S., CXXVIII, PI. Ill, figs. 24 and 25). 
The parameres of the male genitalia are peculiar. They 
are rod-like seen from above, but in side view more or less 
boat-shaped; the basal two-thirds are wide, with an evenly 
convex lower margin ; the slender apical third is curved up- 
ward and ends in a blunt, somewhat knob-like point. The 
outer surface is raised into a median, curved, blunt ridge, 
running the whole length. 
