ON THE CETONIIDiE OF SOUTH AFRICA. 



27 



with it, of which the inner one is curved, falciform, exceedingly acute, and nearly as long as the 

 whole tarsus. 



54. As none of the above five sub-genera are found at the Cape — nor indeed in Africa — I 

 have no occasion to say more of them, than that all, except Philistina and Agestrata, have the 

 external process of the maxillae membranaceous. Yet I have never seen the American species 

 of Gymnetis on flowers, but invariably have found them by beating the leaves of trees, out of 

 which they fall on the ground, as if dead, not moving a limb. I suspect that the other 

 sub-genera, from their superior brilliancy of colour, are more fond of flowers than Gymnetis. 



55. From Lomaptera, the metropolis of which is New Guinea, and which has its clypeus 

 deeply bifid, we pass possibly by one of the sections unknown, to the New Holland groupe 

 Schizorhina, which also has the clypeus forked. But Schizorhina is a sub-genus of the 



Genus Y. CETONINUS, Mihi. 

 The thorax of Cetoninus is never lobed behind, but rather emarginate. The mandibles are 

 membranaceous, and the maxillae scarcely ever armed with corneous teeth, but merely furnished 

 with a pencil of hairs. The females always have the anterior tibiae externally dentated ; and 

 both sexes almost always have the epimeron prominent between the angles of thorax and elytra. 

 The species of this genus are found in all quarters of the globe, but particularly in Africa. In 

 America they are comparatively rare, the sub-genus Gymnetis of the preceding genus 

 Gymnetinus assuming their place there in the economy of nature. The following are the 



B. — Males having the an- 



j'ciypeus emarginate in both sexes. Mentum somewhat 

 ^^ emarginate. 



CoRYPHE, G. P. Clypeus not emarginate. Mentum not emarginate. 



Schizorhina, K. 



3 GoLiATHus, Lam. Clypeus of males horned. Mentum deeply emarginate. 



terior tibiae without 

 teeth, except where 

 the insects are ex- 

 tremely close to the 

 normal groupe. 



A. Males havmg the ante- Ischnostoma, G. P. Mentum not sub-quadrate, but generally convex in front, 



rior tibise externally <| 



dentated. \j> Cetonia, G. P. Mentum sub-quadrate, and almost emarginate in front. 



56. They who study natural history philosophically, must have observed with Fries how 

 strongly marked are those analogies which exist between the corresponding points of the two 

 parallel divisions of a normal groupe. Here the genera Cetoninus and Gymnetinus form the 

 normal groupe of the family of Cetoniidce, and the analogies between their sub-genera are as 

 follow : — 



1 Lomaptera. Clypeus cleft in both sexes. 1 Schizorhina. 



2 Agestrata. Males with unarmed anterior tibise. 2 Coryphe. 



3 Philistina. Males with a horned clypeus. 3 Goliathus. 



4 Macronota. Thorax narrower than elytra ; feet long. 4 Ischnostoma. 



5 Gymnetis. Body depressed ; feet short. 5 Cetonia. 



Again the Sub-genera of Cetoninus represents the five Genera of the Family, thus : 



Schizorhina by its cleft clypeus represents Lomaptera of Gymnetinus. 



Coryphe is a part of and the very perfection of Cetoninus. 



Goliathus by the epimeron of the Incce represents Trichinus. 



Ischnostoma by the convex mentum of the Ccelocephalce Cryptodinus. 



Cetonia in exterior form agrees peculiarly with Macrominus. 



Note. Thus we learn that although Cetonia be a normal sub-genus of Cetoninus, it does not repre- 



E 2 



