52 THE UNIVERSITY SCIENCE BULLETIN. 
O. flaviclavus Barber 1918. 
Gan. Ent; XIV, p. 215. 
“Brownish-black. Very much the appearance of O. americanus, to 
which it is closely related, having the usual carinate and rugulose face. 
However, somewhat smaller than that species with the clavus entirely 
yellow. The pronotum with the lateral margins gently rounded, more 
converging anteriorly, the anterior margin being narrower than the width 
across the eyes; the anterior angle of the pronotum sharply rounded 
and not projecting anteriorly as in americanus; the expanded part of 
lateral margins narrower, with a small yellowish spot just posterior to 
the anterior angle; the humeral angle almost rectangular, projecting but 
a trifle beyond margin of corium. Extreme edge of corium very narrowly 
pale, but the usual pale marginal spots are lacking. Surface with the 
usual pearl grey spots. Beneath, with the sternum slate grey; the 
acetabula, posterior and lateral flange of the prosternum, elytral flange 
anteriorly, posterior margin of metasternum, legs and venter, pale; legs 
lightly infuscated. Prosternum, mesosternum, externally, and metas- 
ternum before the posterior angle, distinctly punctate. 
“Length, 34% mm.; width of pronotum, about 2 mm. 
“Described from a single male in the collection of Mrs. Annie Trum- 
bull Slosson, taken by her at Ormund, Florida.” 
O. banksi Barber 1913. 
Can. Ent. XIV, p. 214. 
“Broad ovate, brownish black. The head, behind the vertex, opaque, 
from there anteriorly, shining and obliquely, finely rugulose and tri- 
carinate; one carina next each eye and a median one, continuous from 
vertex to apex; transversely suleate midway between ocelli and base of 
head. Pronotum with anterior margin almost truncated, with the an- 
terior angles next the eyes rounded and not projecting forward or out- 
wardly beyond the exterior margin of the eyes; entire lateral margins 
gently rounding posteriorly; humeral angle rounded, not very prominent; 
lateral margins broadly expanded, pale; this mark broadest about the 
middle, more abruptly rounded anteriorly, and tapering posteriorly to 
osecupy the entire margin; the remainder of the surface brownish black, 
elevated and transversely, but not very deeply, suleate a very little 
behind the middle; posterior lobe, middle and anterior part of first lobe 
more coarsely punctate, the latter with two or three transverse weak fur- 
rows. Scutellum almost equilateral, rather coarsely punctate and trans- 
versely furrowed; anteriorly with a transverse elevated ridge, behind 
which it is depressed. Corium not demarked from membrane, broadest 
across the middle, with lateral margin gently rounded to just beyond 
middle, where it more, abruptly rounds off to the rather narrow apical 
part of membrane; the external margins either broadly pale throughout 
or in part suffused with fuscous and reflexed,.without the usual series of | 
pale marginal spots which occur in O. americanus. Clavus and corium, 
anteriorly, with coarse scattered punctures. Nervures of the membrane 
indistinct. General surface with indications of the customary bluish 
grey markings, unless denuded, when the whole upper surface is smooth 
and shining. Beneath on sternum and venter paler, with rostrum, 
acetabule, coxe, legs and external angle of metathorax pale yellow. 
Prosternum rather coarsely punctate. 
“Length, 4mm. Width of pronotum, 2 mm. 
“Described from three males and one female collected by Mr. Nathan 
Banks of Glencarlyn, Virginia, in June. Judging from the meagre 
descriptions and indifferent illustrations at hand, I am led to the opinion 
that this species is most nearly related to O marginatus Latr., of Europe. 
But having no specimens of that species for comparison, I am, at this 
