RHINOTMETUS. 47 



12. Rhinotmetus sulcicollis. 



R. oblongo-ovatus, robustus, antice attenuates, punctatus, niger ; 

 capite producto, ad apicem carinato, inter ocidos transverse foveo- 

 lato, ad basin punctato, rufo; thorace elongato, antice coarctato, 

 apud angulos basales obsolete depresso, ad medium longitudina- 

 liter foveolato, impimctato, rufo ; elytris sat magnis, ante me- 

 dium oblique depressis, striato-punctatis, nigro-cyaneis ; antennis 

 filiformibus, robustis, fuscis, ad basin nigris ; pedibus rufis. 



Long. corp. 2\ lin., lat. 1^ lin. 



Oblong-ovate, robust, attenuated in front, punctate (more deeply 

 than in the preceding species), glabrous, black. Head produced 

 anteriorly : from the angles of the labrum is an oblique carination 

 extending to the base of the antennae ; between these is a third, ob- 

 solete and medial : above the base of the antennae is a well-marked 

 longitudinal and also a transverse fovea, forming together the cha- 

 racter of the letter T ; this fovea is the more apparent from having 

 its sides raised : eyes large and prominent ; the surface at the base 

 thickly and finely punctate ; the colour throughout is rufous. Tho- 

 rax subelongate (almost quadrate), coarctate in front; the ante- 

 rior angles much depressed and obsolete, the sides marginate ; near 

 the basal angles is an obsolete depression, while a medial longitudi- 

 nal fovea extends from the base of the head to the scutellum ; the 

 surface is impunctate and rufous, glabrous. Scutellum triangular, 

 impunctate, rufo-fuscous. Elytra broader than the thorax, robust, 

 subparallel ; a broad antemedial depression extends obliquely up- 

 wards towards the shoulders, giving a prominence to the surface near 

 the scutellary angles ; the surface is covered throughout with punc- 

 tures arranged in the form of striae — fine, yet not so obsolete as in 

 R. cyanipennis ; the colour is black with a deep purple hue. An- 

 tennas robust, filiform, fuscous, the three basal joints being rufous. 

 Legs rufous throughout. 



This species is broader and more robust than R. elegantulus ; it is 

 not striated (as to its elytra) like R. rujicollis ; the punctures on the 

 elytra are coarser than in R. cyanipennis ; besides which distinc- 

 tions, the longitudinal thoracic fovea sufficiently distinguishes it from 

 all adjoining species. 



Found in the neighbourhood of Rio Janeiro. 



13. Rhinotmetus elegantulus. 



R. oblongo-ovatus, subattenuatus, punctatus, niger, nitidus ; capite 

 producto, antice carinato, inter ocidos transverse foveolato, punc- 

 tato, rufo; thorace subelongato, antice constricto, apud angulos 



