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1.
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Labrum horizontally
produced with respect to clypeal apex (Fig. 1), distinctly separated
from clypeus |
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1'.
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Labrum
vertically produced with respect to clypeal apex (Fig.2) and more
or less fused to clypeus |
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![](images/rut1.gif) |
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![](images/rut2.gif) |
Figure
1. Head, lateral view, with labrum horizontally produced with
respect to the clypeus. C=clypeus, L, =labrum, M=mandible. |
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Figure
2. Head, lateral view, with labrum vertically produced with
respect to the clypeus. C=clypeus, L, =labrum, M=mandible. |
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2(1).
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Margin of elytra
with membranous border. Antenna 9-segmented |
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2'.
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Margin
of elytra without membranous border. Antenna 10-segmented (except
in Parachrysina (Areodina), Eremophagous (Pelidnotina),
and female Pseudogeniates richterianus (Pelidnotina)] |
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3(1).
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Mentum
and labrum each with median, apical tooth
or projection (Fig. 3) |
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3'.
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Mentum lacking
median, apical tooth or projection; labrum with or without median,
apical tooth or projection (Figs. 4, 5) |
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... |
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Figure
3. Head (frontral view) showing labrum and
mentum with median, apical tooth (Geniatini
and Anoplognathini). |
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Figure
4.Head (frontral view) showing labrum mentum with median,
apical tooth; mentum lacking tooth (Adoretini). |
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Figure
5.Head (frontral view) showing labrum and
mentum lacking median,
apical tooth (Spodochlamyini). |
C=clypeus, L=labrum, M=mentum
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4(3).
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Labrum with
median, apical projection; apex overhanging mentum (Fig.4) |
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Adoretini |
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4'.
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Labrum
and mentum both simple, lacking median, apical projection (Fig. 5) |
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Spodochlamyini |
![](images/rut4.gif) |
............... |
![](images/rut5.gif) |
Figure
4.Head (frontral view) showing labrum mentum with median,
apical tooth; mentum lacking tooth (Adoretini). |
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Figure
5.Head (frontral view) showing labrum and mentum lacking median,
apical tooth (Spodochlamyini). |
C=clypeus, L=labrum, M=mentum |
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5
(3).
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Protarsomeres
dorsoventrally flattened and expanded apically in males and/or males
and females (Fig. 6) |
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5'.
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Protarsomeres
simple, not dorsoventrally flattened and expanded apically in males
or females (Fig. 7) |
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Figure
6. Dorsal view of protarsomeres of Geniatini. |
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Figure
7. Dorsal view of protarsomeres of Anoplognathini. |
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