258 Mr. G. J. Arrow on Sexual Dimorphism in 



A. transvalensis, sp. n. 



Elongato-ovata, robusta, testacea, tibiis (anterioribus partim) 

 tarsisque rufis ; clypeo brevi rotundato-quadrato rugoso, fronte 

 dense punctato ; prothorace antrorsum arcuate vix angulariter 

 contracto, cum scutello dense punclatis ; elytris profunde lineato- 

 punctatis ; pygidio subtilitei- stiiolato-punctato ; tibiis anticis acute 

 bidentatis ; sterno longe fulvo-hirto. Long. 16 — 18 mm. 



^. Clypeo utrinque subexcavato, margine valde reflexo, pedum 

 anteriorum unguiculis externis inequaliter fissis, dentibus tibialibua 

 inferioribus Ijrevibus et curvatis. 



$ . Paulo major ; clypei margine vix reflexo ; pedum anteiioruni 

 el mediorum unguiculis externis equaliter fissis, tibiarum anteriorum 

 dentibus inferioribus longis et rectis ; elytris geminato-lineato-pimc- 

 tatis. 



Hah. Transvaal, Pretoria {Distant). 

 The head is relatively broader than in the two preceding 

 species, and the clypeus is shorter. 



A. distanti, sp. n. 



Prcccedenti valde affinis sed minus distincte punctata, prothorace 

 subtilissime punctato, antice fortiter contracto, marginis anterioris 

 cmarginatione angustato ; elytris parura profunde lineato-punctatis ; 

 corpore subtus parce hirto, tibiis posticis tarsisque omnibus rufis. 

 Long. 18 mm. 



^ . Pedum anteriorum unguiculis externis inequaliter fissis, tibi- 

 arum anteriorum dente inferiore brevi et curvato. 



9. Paulo major, pedum anteriorum et mediorum unguiculis 

 externis equaliter fissis, tibiarum anteriorum dentibus inferioribus 

 longis et rectis. 



Hah. Transvaal, Pretoria {Distant). 



This species exactly resembles the preceding one in size 

 and coloration, but is distinguished by its less distinct 

 puncturation, the narrower emargination of the prothorax. 

 the paler colour of the middle tibiae and the less abundant 

 pubescence upon the sternum. I have only separated 

 them after a careful comparison of many specimens from 

 various collections. 



A. dcnuda, sp. n. 

 Cylindrica, vix convexa, testacea, clypeo tibiis tarsisque nigris ; 

 tibiis anticis obtuse bidentatis ; capite dense punctato, clypeo brevi, 

 rotundato-quadrato ; prothorace subplanato, uitido, cum scutello 



