463 



This is the commonest form of the species and has an extremely 

 wide distribution, ranging from Guinea to Angola in the west and 

 right across the continent to Tanganika in the east. It is liable to 

 considérable variation in size and coloration. The clypeus has only 

 a slight or no central prominence on the apical margin, the thorax, 

 scutellum, pygidium, underside and legs vary from piceous-red to 

 black with the usual pale markings variable in extent, the elytra 

 are very narrowly margined with piceous at the suture and the 

 outer margin is either concolorous or piceous with the usual pale 

 spots well-marked or more or less effaced. In an example from 

 Tanganika there is an additional minute pale spot in the middle of 

 the base of the elytra and another larger one close to the suture 

 at about one fourth from the apex and I possess a spécimen, that I 

 believe to be also only a variety of this species, from M'pala, in the 

 same région, in which the pale latéral spots of the elytra are repla- 

 ced by a continuous and regular white marginal band. 



This form is the trivittata of Gory's monograph. I formerly 

 regarded it as a distinct species and in my notes on the genus 

 Gnathocera, before referred to, it is erroneously given as the 

 trivittata oî Swederus, since then the foregoing intermediate varieties 

 hâve been discovered and I hâve also had opportunities of exami- 

 ning a much greater number of examples from various localities 

 which has fairly convinced me that it should be reduced to the rank 

 of a mère variety of trivittata. 



3. Gnathocera rufipes Jans. 

 Angola (D r Welwitsch). 



4. Gnathocera valida Jans. 



Moliro, Tanganika (J. Duvivier); Forêt de Moletse(D. E. Holub); 

 Zambesi. 



The original spécimens collected by D r Bradshaw on the Zambesi, 

 from which I made my description, are evidently somewhat abra- 

 ded, in the fresher examples now before me from Moliro the 

 elytra, especially towards the apex, as will as the head and thorax 

 hâve a sparse but distinct and long pubescence, this character 

 together with the much closer and irregular punctuation-and more 

 strongly costate elytra serve to distinguish the species from ail 

 the forms of trivittata, to which it is closely allied. In ail the 

 spécimens that I hâve seen the white marginal spots of the elytra 

 are large and well defined, in one of the Moliro examples there is 

 an extra spot at the suture about one fifth from the apex. 



5. Gnathocera truncatfa n. sp. 



Olivacea, nitida, longe albo-pilosa ; thorace crebre punctato, 

 albo-trivittato ; scutello albo-vittato; elytris bicostatis, punctatis, 



