1.
.  		Pronotum with two transversally elongated
tubercles on apical half and two horns
in middle (Fig. 1)

Figure 1. Pronotum of Glyphoderus centralis (male).
.

1'.
.
.

Pronotum with two horns in middle and two transversally elongated tubercles (sometimes developed as horns) on the basal half
.
.
2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2(1).
.		 Pronotal horns and tubercles on margin of medial depression (Fig. 2)
 

2'.
.
.

Pronotal horns on margin of central depression and tubercles of basal half included
in central depression (Fig. 3)
.
Figure 2. Pronotum of Glyphoderus monticola (male).
Figure 3. Pronotum of Glyphoderus sterquilinus (male).