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LAWRENCE S. DILLON AND ELIZABETH S. DILLON 101
apical one slightly sinuate medially, basal oblique laterally; disk with three tubercles,
median one elongate, narrow, 110t reaching to apex, the others placed one
on each side, broad, rounded, feebly elevated. Scutellum transverse. Elytra with
sides straight, slightly narrowed to apices, which are separately rounded; disk with
feeble, elongate gibbosities basally, coarsely, rather closely punctate, without granules,
more finely so apically; humeri prominent, angle not tuberculate but from it a
short carina extends posteriorly. Prosternum simple, nurrow, widened from middle
to b:le; mesosternum deeply cmarginate at apex. Legs rather short; procoxae
globose, in m:lle anteriorly feebly tuberculnte; femora clavate, profemora rugose
basally in male; metatibiae expanded moderately to apex in male. Antennae
slightly Jonger than body in male, slightly shorter than body in femllle, slender;
sea.pe gradually clavate, lower surface not (or feebly) arcuate; third segment onethird
longer than scape, feebly sinuate; fourth slightly shorter than sc.ape.
GENOTYPE.-HypselonLus syrinx Bates, herewith designated. Selected
as it is the species most frequently encountered and was
listed by Thomson along with Plerodia singularis, Plerodia spuria,
and Plerodi{t pygrnea in his original description of the genus without
designation of the type.
KEy TO SPECIES
1. Elytrll. with yellowish confluent mllcultlC arranged in evcr:ll iines extending their
full length, more distinct posteriorly ........................... variegata.
Elytra without colored lines extending their full lengt.h . . . . . . . . . .. . . . . . . .. . 2.
2. Elytra with a rather distinct oblique vittn. from humerus to suture at apical
one-third, thence indistinct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8yrinx.
Elytrn with oblique vitta obsolete or wanting ...................... 8ingulari8.
Plel'odia syrinx Bates
PLATE V, PJGURE 7.
fiYP8elofllw BtlrillX Bates, Ann. Mag. Nat. Hist.., (3), XVI, 1865, p. 170.
Ilypsioma syringa Bates, idem.
Plerodia syrinx Bates. Thomson, Physis, Il, 1868, p. 61.
Plerodia pygmea Thomson, Physis, II, 1868, p. 61.
Distinguished by the antennal horn of male being longer than
in other species; elytral oblique vitta rather distinct, extending indistinctly
to apex, and pl'onotum conical, discal tubercles well elevated.
MALE. Elongate-ovate, robust, subcylindrical, elytra subconvex; bead and
pronotum piceous, elytra paler. Head above thinly yellowish-gray pubescent, vaguely
and irregularly mottled with brown ; front dark brown pubescent, with a. few
indistinct, yellowish-gray maculae. Pronotum with mottled yellowish-gray and brown
pubescence, an indistinct vitta each side laterally which is prolonged shortly onto