506 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Anal segment of male tubular, in profile expanding distally, postanal 
portion deflexed, equal in length to preanal portion, telson fingerlike, 
three-quarters as long as postanal portion of segment. Pygofer with 
sides very slightly sinuate, devoid ventrally of a median process on 
hind margin. Aedeagus U-shaped in profile, a pair of rather long 
spines ventrally near base directed posteriorly and ventrad; a broad 
bifurcate spine, with the upper limb shorter, arising near apex on 
each side and directed anteriorly ; apex of aedeagus curved anteriorly, 
beaklike in profile, thin, with two short sclerotized thickenings visible 
inside. Genital styles broad, ventral margin longer than dorsal, upper 
margin almost straight, apical margin oblique, apical process in form 
of a broad slightly curved spine directed vertically. 
Anal segment of female tubular, deflexed, postanal portion rather 
longer than preanal, telson long. Ovipositor with lateral styles 
broad, dorsal margin oblique, almost straight, ventral margin curved, 
strongly convex, apex narrowly membranous; first valvulae broad, 
with four small teeth and two larger apical teeth on dorsal margin. 
Pregenital sternite produced on hind margin in middle third, median 
area with margin straight, transverse. 
Ege narrowly ovoid, more flattened on one side, a short clavate 
process directed obliquely upward from one pole, and from its base 
two narrow ridges, subparallel and approximated, passing along egg 
to opposite pole; length, 1.1 mm.; width, 0.2 mm. 
Described from 13 males and 29 females collected by the writer near 
Santa Margarita, Trinidad, B. W. I. (May 4, 11, June 8, 1942, and 
subsequent dates), on Cordia, Erythrina, and fiddlewood. Holo- 
type male and allotype, U.S.N.M. No. 56751; paratype in B.M.N.H. 
15d. Wings with apical margin cleft; anal area very large. 
Tribe THIONIINI 
Genus THIONIA Stal 
Thionia STA, Berliner Ent. Zeitschr., vol. 8, p. 821, 1859. (Genotype, JSsus — 
longipennis Spinola, designated by Van Duzee, Check list of Hemiptera of 
America north of Mexico, p. 81, 1916.) : 
Form rather broadly oval. Vertex broad, anterior margin trans- 
verse, curved, or even somewhat produced; frons broad, median 
carina usually present, lateral carinae present or obsolete, a series of 
pustules inside lateral margins. Pronotum short, anterior margin 
distinctly convex, lateral margins very short, posterior margin trans- 
verse, with a median notch; mesonotum short, less than combined 
length along middle line of vertex and pronotum, lateral margins — 
strongly oblique, slightly sinuate, scutellum pointed at apex. Tegmina 
rather broad, costal margin distinctly rounded, commissural margin — 
straight, apical margin strongly rounded, veins simple, Sc and R 
