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178 THE TRIBE ONCIDERINI
with lower lobe ovate, one-third again as tall as gena; antelmai tubercles ratber
widely separated, prominent, at apex shortly, very robustly horned. Franotum
transverse, sides nearly straight, tapering feebly to apex, lateral tubercle well ele­
vated, terminating in a long, robust, blunt process; apical and basal transverse sulcus
feeble medially, the baS!l1 one continued obliquely at sides; disk with a feeble,
slightly elongate tubercle basally at middle, two on each side, the inner one mora
anterior and feeble, the more lateral one subbasal and moro prominent, across base
with a few, large punctate-granules. Scutellum transverse, si des feebly arcuate, apex
subtruncate. Elytra with sides feebly arcuate to apices, which are sep.'1rately and
indistinctly rounded; base subgibbose, sparsely granulate-punctate, these punctures
laterally forming rugosities, rest of disk with scattered punctures in the dark mac­
ulae, more profuse apically; humeri slightly prominent, the anterior margin straight,
oblique, the posterior angle with a moderate-sized tubercle, the anterior angle with
a smaller but prominent tuberele direeted obliquely anteriorly. Prosternum broad­
ened behind middle of procoxae, mesosternal process emarginate at apex. Procoxae
prominent, with a short, obtuse tubercle anteriorly; femora gradually clavate, pro­
femora very finely, feebly rugose on front and hind faces. Fifth sternite about twice
length of fourth, apex retuse, with a narrow, elongate, triangular impression medi­
ally: Antennae one-third longer tban body, fimbriate beneath on third to sixth
segments; scape nearly attaining middle of pronotum, slender, gradually clavate,
with one or two feeble grooves below at base; third segment feebly bisinuous, the
apical curve more distinct, two-thirds again as long as scape.
LENGTH 22 mm; width 8 mm.
Holotype.Femalej Bueyes, Bolivia ; [A.N.S.P. number 8250J.
Tybalmia ianthe Dillon and Dillon, spec. nov.
PLATE VII, FIGURE 13.
Resembles pia;e in coloration and in form of humeri ; it differs
in the more transverse scutellum, the elytral median macula being
broader and more transverse, preceded by a distinct, l'ounded, pale
spot ; eye with lower lobe broader and shorter ; genae transverse;
and pl'onotal lateral tubercle with a shorter, very obtuse process.
MALE. Elongate-ovate, rather robust, subcylindrical ; black, elytra fuscous.
Hcad and pronotum dark brown IlUhescent, slightly varied with fulvous-gray, former
with a mther indistinct vitta. each side of middle, dark brown. Pronotum with sev­
eral very small fulvous maculae. Scutellum entirely Iulvous-gray pubescent. Elytra
with basal third covered with dark brown pubescence, variegated with fulvous-gray,
rest of disk fulvous-gray, with a few scattered, small, dark brown maculae, some­
what more numerous on apical third; just behind middle encb elytron with an ir­
regular, moderate-sized, dark brown macula, its anterior margin preceded by a
rounded, pale fulvous spot, about half its size. Body beneath fuscous, covered with
brown pubescence; abdominal sternites laterally indistinctly marked with fuJvous.
Legs fuscous, fulvous-gray pubescent, densely mottled with dark brown. Antennae