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1.
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Metatarsus
with two claws. |
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1'.
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Metatarsus
with single claw (Hoplia Illiger). |
HOPLIINI
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2(1).
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Metatibial spurs
set widely apart, below and above tarsal articulation |
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2'.
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Metatibial
spurs subcontiguous, located below tarsal articulation |
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3(2).
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Labrum
distinct or not, located on apical margin of clypeus |
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3'.
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Labrum distinct,
located beneath clypeus (Phytolaema Blanchard) |
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4(3). |
Metatibial
spurs on apical margin of metatibiae |
SERICINI |
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4'. |
Metatibial
spurs on subapical notch of metatibiae |
SERICOIDINI
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5
(2).
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Labrum not
visible or coplanar with clypeus. |
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5'.
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Labrum
distinctly visible below clypeus. |
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6
(5).
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Labrum not
visible
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6'.
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Labrum
coplanar with clypeus
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7
(5).
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Sutures between
abdominal sternites distinct, at least laterally. |
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7'.
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Sutures
between abdominal sternites with sutures obliterated.
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Chaunocolus
or Chnaunanthus
(incertae sedis)
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8
(7).
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Anterior pronotal
margin with a membranous border, if border absent, then metacoxae
widely separated. |
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8'.
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Anterior
pronotal margin without membranous border, metacoxae contiguous or
subcontiguous. |
MELOLONTHINI
KEY
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9
(8).
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Fifth abdominal
sternite and propygidium separated by a partial or complete suture. |
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9'.
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Fifth
abdominal sternum and propygidium not separated by suture. |
DIPLOTAXINI
KEY
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10
(9).
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Metatibial
spurs set apart, located above and below tarsal articulation separated
by tarsal articulation. |
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10'.
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Metatibial
spurs absent, or with one or two subcontiguous spurs located below
tarsal articulation. |
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MACRODACTYLINI
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11
(10).
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Claws bifid
or toothed; labrum distinct, transverse, not fused to labrum |
PACHYDEMINI
KEY |
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11'.
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Claws
simple; labrum reduced, conical, fused to labrum
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Acoma
(incertae sedis)
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