462 



LIST OF THE SPEGIES OF GNATHOGERA 



IN THE COLLECTION OF THE ROYAL MUSEUM BRUSSELS, 



WITH DESCRIPTIONS OF TWO NEW SPECIES 



by Oliver E. .1 an sou, F. E. S., etc. 



1. Gnathocera afzelii Swarlz. 

 Sénégal; Sierra Leone. 



2. Gnathocera trivittata Swed. 

 elata Fàb., vitlicollis Kirby. 

 Sénégal; Libéria; Guinea. 



The typical form of this species appears to be confined to the 

 extrême western part of Africa from Sénégal to Guinea, a very 

 similar range to that of afzelii. This form is distinguished by the 

 broad black suturai and outer margins of the elytra, black thorax 

 and legs and by having a very distinct central tooth on the anterior 

 margin of the clypeus. 



In my notes on the genus Gnathocera (Cist. Eut. II, p. 255, 1877) 

 •I separated this form as a species distinct from trivittata Swed., 

 under the name of elata Fab., I had then been unable to consult 

 the original description of Swederus, published in a rather inac- 

 cessible work, and was unaware that it applied equally well to this 

 form and therefore takes priority. 



Var. confluens Kraatz. 



Benue; Dahomey. 



In this form there is only a slight central prominence on the 

 anterior margin of the clypeus, the elytra are narrowly margined 

 with black or piceous at the suture and hâve the pale spots on the 

 outer margin generaily larger but not always confluent as described 

 by the author, otherwise it is similar to the typical form. 



Var. segyptiaca Kraatz. 



Niam Niam (Bohndorflf). 



This variety is usually larger than the other forms of the species 

 and has the thorax and pygidium either black or dark brown, the 

 elytra very narrowly margined with piceous at the suture and the 

 outer margin reddish piceous, or black, with the pale spots large, 

 underside and legs red, the apical margin of the clypeus with a 

 slight central prominence. In my own collection there are spéci- 

 mens from Khartoum. 



Var. dorsodiscolor Voet. 



Guinea; Congo; Haut Kassaï; Forêt de Si-Banghi (J. Carradot); 

 M'pala (J. Duvivier); Rég. du Tanganika (Capt. Storms). 



