1.
 Metatarsus with two claws.
2
 

1'.

 Metatarsus with single claw (Hoplia Illiger).
HOPLIINI
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2(1).
.
 Metatibial spurs set widely apart, below and above tarsal articulation
.
3
 

2'.
.

 Metatibial spurs subcontiguous, located below tarsal articulation

.
5
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3(2).
 Labrum distinct or not, located on apical margin of clypeus
4
 
3'.
.		 Labrum distinct, located beneath clypeus (Phytolaema Blanchard)

.
XYLONYCHINI
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4(3). Metatibial spurs on apical margin of metatibiae
SERICINI
 

4'.

 Metatibial spurs on subapical notch of metatibiae
SERICOIDINI
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5 (2).
 Labrum not visible or coplanar with clypeus.
 

5'.

 Labrum distinctly visible below clypeus.
7
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6 (5).
.
Labrum not visible
.
PODOLASIINI
KEY
 

6'.
.

Labrum coplanar with clypeus
.
ONCERINI
KEY
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7 (5).
.
Sutures between abdominal sternites distinct, at least laterally.
.
8
 

7'.
.
.

Sutures between abdominal sternites with sutures obliterated.
.
Chaunocolus or Chnaunanthus
(incertae sedis)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8 (7).
.
Anterior pronotal margin with a membranous border, if border absent, then metacoxae widely separated.
.
9
 

8'.
.

Anterior pronotal margin without membranous border, metacoxae contiguous or subcontiguous.
MELOLONTHINI
KEY
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9 (8).
.
Fifth abdominal sternite and propygidium separated by a partial or complete suture.
.
10
 

9'.
.

Fifth abdominal sternum and propygidium not separated by suture.
DIPLOTAXINI
KEY
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10 (9).
. 		Metatibial spurs set apart, located above and below tarsal articulation separated by tarsal articulation.
.
11
 

10'.
.

Metatibial spurs absent, or with one or two subcontiguous spurs located below tarsal articulation.
.
MACRODACTYLINI
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11 (10).
.
Claws bifid or toothed; labrum distinct, transverse, not fused to labrum
PACHYDEMINI
KEY
 

11'.
.

Claws simple; labrum reduced, conical, fused to labrum
.
Acoma (incertae sedis)