BY T. G. SLOANE. 
1103 
of the tridentate Carenums I have examined, though in all the 
species of Carenidium, Conoftermn, and Neoscaphus that I have 
seen, it has been wanting. 
In addition to the characters mentioned above, the following 
may be mentioned as variable, and of assistance in classification : 
the antennae — their general form, the shape of the apical joint, 
and the relative proportions of the second and third joints ; the 
nientum — both the lobes and the median tooth ; the form of the 
thorax and of the elytra ; the legs — the shape of the antei'ior 
femora, as well as the length and genei’al appearance of the legs. 
I believe the Carenides may be divided into several main 
divisions, of which the three most imjiortant are Scaraphites, 
Ellery scajjhus, and regarding as sub-genera of Carenum 
all those names in italics in the following list. Of the unidentate 
genera Monocentrum and Teratidhim I cannot speak definitely, 
not knowing them. 
The arrangement of the genus Carenum, proposed by Mr. 
Macleay (Trans. Ent. Soc. N.S.W. Vol. I. pp. 55 and 146), has 
been of great use to me ; and for the typical Carenums all his 
divisions are admirable. The following synopsis is merely a 
tabular list of genera in which only those characters which are 
necessary to divide the different genera and sub-genera have been 
used : — 
Table of the genera and sub-genera of the group Carenides. 
I. Palpi filiform, last joint not triangular. The 
second external tooth of the anterior tibim 
nearer the apex than where the inner apical 
spine rises. Intermediate tibiae dilatate at 
apex, with strong bent and obtuse apical si)ur. 
Scaraphites. 
II. Palpi with last joint triangular or securiform. 
The second external tooth of the anterior tibiae 
further from the apex than where the inner 
apical spine rises. Intermediate tibiae not 
dilatate ait aipex. 
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