new or little hiown Cetoniida?. 107 



affinity to ;S'. Ucolor, Westw., there can be but little doubt that 

 it likewise is a native of Soi;th Africa. 



Plectrone j)olita, n. sp. 



Pitchy-black, shining, tarsi greenish. Head strigose, slightly 

 convex in the centre ; clypeus much widened in front, the 

 deflexed lateral margins finely strigose, centre and apex sparsely 

 punctured, the apical margin reflexed and slightly emarginate. 

 Thf)rax much narrower than the elytra, widest at the base, the 

 basal two-thirds strongly emarginate at the sides, thence rounded 

 and narrowed to the front, longitudinally sulcate in the centre, 

 sparsely punctured in front, and coarsely strigose at the sides. 

 Scutellum sulcate in the centre and strigose at the base. Elytra 

 depressed at the suture and sides with a large shallow strigose 

 impression next the suture behind the middle, the sides and apex 

 coarsely strigose, sutural angles slightly produced. Pygidium 

 convex and transversely strigose. Beneath with the thoracic 

 segments strigose at the sides, abdomen longitudinally impressed 

 in the centre and with scattered punctures at the sides; meso- 

 sternal process short, liroad, and rounded at its apex; legs 

 strigose and piuictured, anterior tibite without lateral teeth, 

 posterior tibiae with a strong keel on the inner side produced 

 into an acute point at its apex. The female has the clypeus 

 narrower and not reflexed at tlie apex, the anterior tibiiv witli 

 two strong lateral teeth and the posterior tibia? without a keel. 

 Length 29 mm. 



Nias Island, W. of Sumatra. 



This species, of which I have seen several specimens from the 

 same locality in other collections, differs from P. triftis, Westw., 

 in its colour, in having the thorax emarginate at the sides, the 

 elytra more strongly sculptured and in the absence of minute 

 punctuation, which gives it a mucli more polished appearance. 

 The shape of tlie keel or spur on the posterior tibias of the 

 male also differs from tiistts, if the insect regarded by Wallace 

 (Trans. Ent. Soc. ISer. 3, Vol. IV, p. o4(), t. xiii, f. 1) as such, 

 really is the male of that species. 



P. higuhriSj O. Jans, (ante p. 63), is more like this species 

 as regards colour but has a minute punctuation similar to that 

 of tristis. The mesosternal process in the type specimen of 

 tristis, which I have examined, is not so l)road as it is repre- 

 sented ni Westwood's figure (Arcana Ent. I, t. 2S, f. 5b.). 



