COLEOPTERA. va 
maxillz is truncated, or obtuse and entire. These Insects are gene- 
rally large and ornamented with brilliant colours *. 
The others, proper to the hot climates of both continents, are desti- 
tute of the sternal projection; the crotchets of the tarsi, or one of 
them, are bifid; their maxillae frequently terminate by two or three 
teeth. 
Sometimes the antennz consist of ten joints, and the superior ex- 
tremity of the jaws is entire or at most emarginate or bidentate. In 
Levcotuyreus, Mac Leay. 
One of the tarsial crotchest is entire and the other bifid. 
The tarsi, at least the auterior ones, are furnished with a brush be- 
neath ; the latter are dilated in the males. The under part of their 
head is more densely pilose than in the females t. In 
Apoconia, AKirb. Mac Leay. 
All the crotchest of the tarsi are bifid {. 
Sometimes the antennz consist of but nine joints, and the extre- 
mity of the maxille presents three teeth. In 
GeniAteEs, Airb. 
The extremity of the mandibles is emarginated. Under the mem- 
tum of the males we observe a sort of circular brush formed of com- 
pact hairs, plane or incised like a whisk (en maniére de vergette). 
The four first joints of their anterior tarsi are dilated and furnished 
underneath with a brush. One of the crotchets of all the tarsi is entire 
and the other bifid. The anterior of the two first is accompanied at 
its base by a corneous lamina, emarginated inferiorly and rounded at 
the end, forming a sort of spur |]. 
A second division of the Xylophili, which will comprise the Melo- 
lonthidz of Mac Leay, presents the following characters: the labrum 
is in the form of a transversal leaflet, most commonly strongly emar- 
ginated underneath in its middle, so that viewed from before, it has 
almost the figure of a reversed and semitruncated heart. The men- 
tum is as long as it is broad, or longer, somewhat narrowed before 
the summit, and either square or almost cordiform ; its superior mar- 
gin is straight, or more or less emarginated or concave in the middle, 
but without any dentiform dilatation. The maxill are usually scaly 
and armed with several—commonly five or six—teeth. 
This division may be separated into two sections, one of which will 
embrace the genus Melolontha of Fabricius, as restricted by Illiger 
and myself, and the other that of Hoplia, Lat. The first of these sub- 
* See Hor. Entom., I, 143, and Lin. Trans., XII, p. 401, 405. 
+ Hor. Entom., I, p. 145 ;—Melolontha sulcicollis, Germ., Insect. Spec. Noy., 
. 124. 
7 + Kirb., Lin. Trans., XII, p. 401 ;—A. gemellata, ejusd., Ib. XXI, 9. 
|| Kirby, Lin. Trans., XII, p. 401 ;—Geniates barbatus, Ib., XXXI, 8. The Me- 
lolonthze obscura, lanata, Feb., the species called nigrifrons by M. Stevens, and de- 
scribed in the Synon. Insect. of Schcenherr, I, 3, App. 115, and probably other 
species, seem to form a separate subgenus allied to that of Geniates, but with undi- 
lated tarsi. 
