READING PUBLIC MUSEUM AND ART GALLERY

100 THE TRIBE ONCIDERINI
LYDIPTA Thomson
Lydipta Thomson, Physis, II, 1868, p. 52. Lacordaire, Gen. Col., IX, 1872, p. 672.
"Body robust; head elongate, anteriorly plano; front distinctly concave, unarmed;
eyes small, remote. Male antennae as long as body, eleyen segmented;
scape rather elongate, base slender, then gradually enlarged ; third arcuate, longer
than rest; rest decreasing. Prothorax subcylindrical, laterally unarmed. Elytra
robust, convex, humeri slightly produced, laterally longitudinally carinate, then
finely dehiscent, apices rounded. Prosternal and mesosternal processes laminiform;
legs moderate; procoxae in male unarmed ; femora modeately clavate, tarsi moderate,
last segment elongate." (Translation of original description.)
GENOTYPE.-Lydipta pumilio Thomson, by monotypy.
Remarks.-This genus appears to be close to Plerodia and its
allies in its small size, the carinate humeri, and the curved third
antennal segment.
Lydipta pumilio Thomson
Hesycha pumilia Dejean, Cat., 1837, p. 370. [nom. nud.].
Lydipta pumiUio Thomson, Physis, II, 1868, p. 53. Lacordaire, Gen. Col. IX, 1872,
p. 672.
"Robust, black; covered with greenish pubescence; head impunctate; antennae
with scape white and black variegated; rest of segment.s white and fulvous variegated;
segments from third apically black. Prothorax impunctate. Elytra robust,
convex, base black tuberculate and punctate, thence smooth, apices rounded. Body
benoath and legs white and black variegated, tarsi gray. Length 10 mm.; width
4 mm. Brazil." (Translation of the original description) .
PLERODlA Thomson
Hesycha Dejean, Cat. Col., 1837, p. 370 [pars] .
Plcrodia Thomson, Physis, II, 1868, p. BO. Lacordaire, Gen. Col., IX, 1872, p.
667, 670.
The short body form, the antennae only slightly longer than
body in male, the dun coloring and indistinct maculation, the humeri
not tuberculate but with a carina extending to before middle
of each elytron, and the conical pronotum will serve to distinguish
this genus.
Small, elongate-ovate, rather robust, subcylindrical; dark brown to fuscous,
covered with dull colored. pubescence, the markings more or less indistinct. Head
with front elongate, narrow, slightly wider toward epistoma ; gena elongate-vertical;
eye with lower lobe oblong-ovate, about twice genal height; antennal tubercles well
separated, prominent, dentate at apex in male, only feebly produced in female.
Pronotum conical, unarmed laterally, with an apical and bas:1l transverse sulcus,