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“Platycoelia forcipalis cotype Ohs.” label in
Ohaus’ handwriting and the label “Ecuador
Pichincha.” Since this locality is not mentioned
in the original description and all four
types are accounted for, this specimen is not
part of the type series. Type locality: Quito,
Ecuador.
DESCRIPTION. Male (n=37). Length 18.3-
22.5 mm, width 11.4-12.8 mm (Fig. 53). Color
dorsally light green to yellow (sometimes
darkened to dark green after death); yellow
elytral margin; yellow stripes on elytral intervals
1, 3, 5 (sometimes obsolete). Ventrally
light green to yellow. Body ovate, strongly
convex. Head: Dorsal surface glabrous. Frons
sparsely punctate (base) to densely punctate
(apex), clypeus densely punctate, punctures
moderate. Frons not depressed. Frontoclypeal
suture complete. Clypeal apex broadly
rounded, weakly elevated. Eyes separated by
approximately 5.3 transverse eye-widths. Labrum
moderately punctate; punctures moderately
large, setose; setae tawny. Apex of
labrum with large, triangular, medial tooth;
apex of tooth broadly truncate, extending past
apex of mentum. Mandibular scissorial region
with strong apical tooth, molar region with
well-developed lamellae. Maxilla with 2 slender
teeth bracketing 1 large, cup-like tooth.
Apex of mentum with triangular medial tooth
curved into oral cavity. Antenna 10-segmented;
club approximately equal to other
segments combined, slightly longer than
clypeal length. Pronotum: Surface glabrous,
sparsely to moderately punctate, with small
and moderate punctures. Marginal bead weak
laterally, absent apically and basally. Elytron:
Surface glabrous; longitudinal striae strongly
impressed, punctate, punctures moderate
with dark coloration; intervals impunctate.
Suture with distinct apical spine (sometimes
worn down). Pygidium: Width approximately
2.3 times length medially. Surface densely
punctate, weakly convex, glabrous except
near apex; setae short, tawny. Venter: Thorax
moderately setose, setae cream colored. Mesothoracic
process strongly produced, projecting
anteriorly to procoxa; apex broadly
rounded; shape conical-elongate, dorsoventrally
flattened. Abdomen glabrous. Apical
MONOGRAPHIC REVISION OF PLATYCOELIA 81
spiracles not extruding. Legs: Protibia with 2
teeth in apical quarter; second tooth subequal
in size to first tooth. Mesotibia and metatibia
widest medially. Protarsomeres 2-4 wider
than long, cup-shaped. Protarsomere 3-4 with
internoapical stridulatory ridge. Protarsomere
5 with internomedial stridulatory tooth.
Mesotarsomere and metatarsomere 5 with
internobasal tooth. Unguitractor plate cylindrical,
with 1 apical and 1 subapical seta.
Modified protarsal claw with length slightly
greater than protarsomere 5, greatly thickened
and elongate when compared with other
claw, dorsoventrally flattened with strong
mediolateral curve, apex unevenly bifurcate.
Modified mesotarsal and metatarsal claws
elongated with ventral tooth, not thickened.
Male Genitalia: Parameres 1.1 times longer
than length of phallobase (Fig. 28). Parameres
strongly dorsoventrally flattened with
apicolateral tooth (Fig. 20), strongly projecting
ventral hook.
Female (n=45). Length 22.0-26.5 mm,
width 14.3-15.1 mm. As male except in the following
respects. Legs: Protibia with 3 teeth in
apical half. Protarsomere 3-4 without
internoapical stridulatory ridge. Protarsomere
5 with internomedial tooth absent.
Mesotarsomere and metatarsomere 5 internobasal
tooth reduced to swelling or absent.
Modified protarsal claw with ventral tooth,
not thickened.
DIAGNOSIS. This species is distinguished
from all other species in the genus Platycoelia
by the following combination of characters:
frontoclypeal suture complete; eyes separated
by more than 5 transverse eye-widths;
labrum with a well-developed, truncate apical
tooth strongly overlapping the mentum;
mentum with a distinct tooth curved into the
oral cavity; antenna 10-segmented; elytral
striae strongly impressed; apex of the elytral
suture with a nub or weak spine; elytral apices
not capable of completely covering the pygidium;
metasternum with a dark medial
patch; protibia in males with 2 prominent
teeth; protibial spur not noticeably shorter
than adjacent tibial apex; mesotarsomere 4
and metatarsomere 4 in males without an
apical stridulatory ridge; protarsomere 5 in