462 
DERBIDAE. 
Cedusa wolcotti sp. nov. Plate XII, Figs. 1, a. 
Male. Length, 2 mm.; tegmen, 3.3 mm. 
Vertex slightly longer than in type species, a faint carina dividing it 
from frons; lateral margins of frons straight, subparallel sided or frons 
slightly broader at apex than at base, a faint median frontal carina; sub- 
antennal plate large, typical; shoulder keels distinct, but small. Tegmina 
slightly narrower than type species, apex more rounded, venation with one 
apical M (M le) missing, apical cells shorter. 
The anal angle of pygofer produced into a long, narrow process, lat- 
eral margins ventrad of process concave; anal segment long, narrow, anus 
slightly basad of middle, broadest at base gradually narrowed to truncate 
apex, the apex has the appearance of being cleft in middle and after- 
wards joined together, in some specimens there is a little hole through the 
middle near apex; genital styles large, broad, the apex broadly rounded 
with a small process on outer margin near base, and a broad longitudinal 
median ridge from base to the inner margin near apex, inner margin 
slightly convex, entire; the apex of the left style is cleft nearly across 
and produced into a small spine, the right style being entire at apex and 
without spine. 
Stramineous, slightly darker over apical portion of mesonotum. Teg- 
mina hyaline, slightly opaquely white; clavus, apical cells and Cu area 
slightly fusecous, a black mark at apex of Cu, smaller one at apices of 
apical cells; veins same color as membrane. Wings opaquely white, M and 
A veins brown, others white. 
Female. Similar to male. The pregenital plate (seventh sternite) pro- 
duced from side to middle, sides of produced portion sinuous, apex rounded. 
Described from twenty-three males and five females from 
Yauco, Porto Rico: (G. NN. Wolcott, Ausust 24, “1923- "Ace 
No. 236), feeding on a palm. Type No. 1135, in Hawaiian 
Sugar Planters’ Experiment Station collection; paratypes in 
U. S. National Museum, Washington, and G. N. Wolcott's 
collection. 
Dysimia gen. nov. 
Se+R-+M. forming a common stalk on the basal fifth, Se+R fork a 
little basad of the middle and level with M fork; Se cell fairly long and 
narrow; M with seven apical veins, pectinate or subpectinate, the first or 
basal sector fureate near base, the second fureate near apex, the third and 
fourth arising near together at apical cross-veins; the Cu with three veins 
entering hind margin, Cu fork slightly before apex of clavus, Cul forked 
near apex; clavus closed, claval veins forking on basal third, entering 
