422 IN SECT A. 



In the other subgenera of the same division, the mentum forms a 

 transverse square, the middle of the superior margin projecting in 

 the manner of a tooth, entire or emarginated. The maxillae are 

 entirely corneous and resemble mandibles terminated by a stout, 

 inclined, elongated tooth, either entire and very obtuse at the end, 

 or divided there into two or three points. The mandibles are always 

 scaly and robust. The labrum is exposed. 



Some, peculiar to Australia, have a sternal point; their tarsial 

 crotchets are entire and unequal. Such is the 



Anoplognathus, Repsimus, Leach. 



The antennae are composed often joints, and the extremity of the 

 maxillae is truncated, or obtuse and entire. These Insects are gene- 

 rally large and ornamented with brilliant colours(l). 



The others, proper to the hot climates of both continents, are 

 destitute 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 antennae consist often joints, and the superior ex- 

 tremity of the jaws is entire or at most emarginate or bidentate. In 



Leucothyreus, Mac Leay. 



One of the tarsial crotchets is entire and the other bifid. 



The tarsi, at least the anterior ones, are furnished with a brush 

 beneath; the latter are dilated in the males. The under part of their 

 head is more densely pilose than in the females(2). In 



Apogonia, Kirb. Mac Leay. 



All the crotchets of the tarsi are bifid(3). 



Sometimes the antennae consist of but nine joints, and the extre- 

 mity of the maxillae presents three teeth. In 



Geniates, Kirb. 



The extremity of the mandibles is emarginated. Under the men- 

 tum of the males we observe a sort of circular brush formed of com- 

 pact hairs, plane or incised like a whisk (en maniere de vergette). 



which is the type of the genus, the thorax must be destitute of horns, and the an- 

 terior tibiae are tridentate on the outer side; but two teeth are found in the same 

 of Pachypus. 



(1) SeeHor. Entom., I, 143, and Lin. Trans., XIT, p. 401, 4U5. 



(2) Hor. Entom., I, p. 145; Melolontha sulcicollis, Germ., Insect. Spec. Nov., 

 p. 124. 



(3) Kirb., Lin. Trans., XII, p. 401; .5. gemellata, ejusd., lb. XXI, 9. 



