394 Transactions South African Philosophical Society, [vol. xiii. 



head is simple ; in the ? the head is simple, the clypeus carinate 

 laterally with the sides bulging a little beyond the carina, and the 

 apex is bluntly sub-dentate in the centre; prothorax sub-trapezoidal, 

 with the base slightly bi-sinuate on each side of the scutellum, and 

 somewhat arcuate above it; elytra elongate, attenuate behind where 

 they are only half the width of the base ; sternal process bluntly 

 arcuate at the end and with a sub-apical transverse suture ; anterior 

 tibiae of $ laminate inwardly and having a deep notch at the base, 

 tri- or quadri-dentate near the apex and with the apical tooth con- 

 spicuously triangular, weakly bi-dentate outw T ardly, the upper tooth 

 is very remote from the apical one; inner part of anterior femora 

 sparingly pubescent, the apical part provided with a strong hamate 

 tooth ; hind tibias moderately densely pubescent inwardly and not 

 dentate on the upper side ; in the $ the anterior tibiae are strongly 

 tri-dentate outw T ardly ; the inner part is also laminate and notched 

 at the base, and the anterior femora hamate at apex, but less 

 conspicuously than in the J . 



The genus includes two species, one of which is a denizen of East 

 and Central Africa, but it reaches also the South African area, and 

 is so variable in colouring that no less than six varieties have been 

 described. The other species is recorded from the Congo. 



The shape of the mentum greatly resembles that of Cozlorrhina, 

 Burm., but the palps cavity is wider, and apart from the differences 

 in the sexual characters of the males of both genera, that of the 

 sternal process is sufficient to separate the two. 



Neptunides polychrous, J. Thorns., 



Plate XLV., fig. 4. 



Bull. Soc. Ent. Fr., 1879, p. 106. 



Var. abundans, Thorns., loc. cit. 



fasciicollis, Thorns., loc. cit. 



laeta, Kolb., Kaf., D. Ost, Afrik., 1897, p. 181. 



Uneaticollis, Kraatz, Deut. Ent. Zeits., 1881, p. 258. 



marginicollis, Kraatz, loc. cit., p. 258. 



purpurascens, Thorns., Bull. Soc. Ent. Fr., 1879, p. 106. 



Male : Bright metallic green with the prothorax black and the 

 elytra green, tlnviscent green or coppery-green, the margins of the 

 dentate lateral processes of the clypeus and the median horn are 

 black, the head is broadly excavated to a short distance from the 

 base, and punctulate laterally above the eyes only, the whole clypeal 

 surface being smooth ; the prothorax and scutellum are also impunc- 



