ON THE CETONIID^ OF SOUTH AFRICA. 



41 



Suh-sectlons. Tyfes. 



2 * * * * * 



2 Horns of head dentated. Thorax sub-circular. Anterior tibiae externally more or less tridentate. G. Wallichii, G. P. 



3 * * * * 1: 



4 * * * * * 



5 Horns of head not dentated. Thorax sub-elliptical. Anterior tibiae externally bidentate. G. opalus, Bv.j). 



Sp. (Cetoninus) Goliathus Wallichii, G. P. 



Descr. Goliathus glauco-flavidus, oculis, unguibus, ano, thoracis lineis duabus abbreviatis, litu- 

 risque elytrorum duabus humeralibus duabus apicalibus nigris. 

 ^ Clypeo antice cavo, bicornuto, cornubus resupinis supra dentatis apice bifidis, clypei linea 



verticali pedibusque ferrugineis. 

 9 Clypeo antice bidentate, yittS. verticali pedibusque nigris. 

 Goliathus Wellech $ . G.P. p. 154. tab. 26. fig. 1. 



Long. 12 lines. 



Note. It is but just to Dr. Wallich, after whom I suppose this insect was named, to correct the 

 mistake which M. Gory has made in the orthography of his name. I have both sexes in my col- 

 lection, from Nepaul. In one specimen of the male, the upper tooth of the anterior tibia is evanescent, 

 so as to make it appear externally sub-bidentate. 



Sp. (Cetoninus) Goliathus opalus, Dupont. 



Descr. Goliathus nitidus flavescens viridi-micans, thorace vage punctato ^dridi-ignescente, tarso- 

 rum articulis apice unguibusque nigris. 

 $ Clypeo antice cavo, bicornuto, comubus productis triquetris supra baud dentatis apice 



antrorsum arcuatis. 

 ? 



Narydus opalus^ Dupont, Mag. Zool. CI. ix. p, 128. 

 Note. In Guerin's Magazine, M. Dupont gives the figure and description of an insect from IMadras, 

 which he places in a new genus, called by him Narydus and Naridus. He gives no distinct character 

 to the genus, but describes two species, of which, although they are exceedingly close to each other in 

 affinity, I suspect his Narydus olivaceus to belong rather to the sub-genus Coryphe. The present species (his 

 Narydus opalus) is curious, as being exactly intermediate between Goliathus Wallichii, G. P., and 

 those brilliant gTeen Goliathi which form the beauty of the section which I have called Smithii. 

 Thus do we return to those Goliathi with the description of which we commenced our observations 

 on this rich and rare sub-genus. I must, however, before I leave the groupe, call attention to the 

 curious analogy that exists between Goliathus opalus and Lamprima cenea, and remark how the clypeus 

 in one takes the form of the mandibles of the other, making Latreille fancy that they were annectent 

 genera. I need scarcely observe that the Goliathus opalus must not be confounded with the Goliathus 

 opalinus of Gory, which is a Coryphe. 



74. Of true Goliathi, I consider that the above-mentioned species may be accounted as dis- 

 tinctly known. But we have now to return to the aberrant groupe of Goliathi Gigantei, and we 

 may observe a Cape insect, which M. Gory has described under the name of Diplognatha concava, 

 to present several points of structure held by it in common with those gigantic beetles. Like 

 them this insect has a three-horned clypeus, although the horns are here considerably modified, 

 particularly the central one, which is short and trifid. The anterior tibiae are externally tri- 

 dentate, as in the females of the gigantic Goliathi, but here they differ, in being tridentate in 

 both sexes. The body is likewise convex. The thorax is rounded. The scutellum is sharp. 

 The epimeron is prominent between the elytra and thorax. The mesosternum is short, broad, 



G 



