TETRAGONOTES. 



53 



Oblong-ovate, subparallel, attenuated in front, punctate-striate, 

 impubescent, black. Head produced in front ; from tbe apex to tbe 

 base of the antennas is an obsolete longitudinal ridge, while imme- 

 diately above their insertion are (when viewed obliquely) two lon- 

 gitudinal tubercular elevations ; eyes large, situated at the base of 

 the head; the surface granulated and black. Thorax quadrate 

 (subelongate), anteriorly rounded (more abruptly and less broadly 

 than in preceding species, thus forming an obscure angle, and showing 

 a tendency to assume the form represented in the following genus, 

 Tetragonotes) ; the anterior angles much depressed, the sides broadly 

 marginate, and the base transversely depressed ; this depression is di- 

 stinct, and not obsolete as in other species : surface inipunctate^neZy 

 flavo-pubescent, rufous. Scutellum triangular, impunctate, black. 

 Elytra broader than the thorax, parallel, punctate-striate, finely sub- 

 pubescent, of a deep dead-black colour. Abdomen black. Antennce 

 robust, filiform, black, the basal joints being suffused with fuscous. 

 Legs black, the posterior tibiae and tarsi suffused with ferrugineous. 



This species is an interesting connecting link between Rhinotmetus 

 and the following genus, Tetragonotes. In facies it is abundantly a 

 Rhinotmetus, but in the form of the thorax it approaches very near 

 to the following genus. 



I captured a single example of this species at Petropolis (Organ 

 Mountains), February 1857. 



Genus 6. TETRAGONOTES*. 



Corpus elongatum, depressum, subparallelum. 



Labrum: constrictum, transversum. 



Palpi maxillares elongati, art. 3° ovato. 



Palpi labiales subovati. 



Antenn m Jili formes, sat robusto?. 



Caput breve, antice (in <$ prwsertim) production. 



Thorax elongatus, rectangularis, hand antice rotundatus, ad latera 



marginatus et angulatus. 

 Elytra subparallela, depressa, apicem versus subattenuata. 

 Pedes : femora postica incrassata ; post, tibia, breves, subincurvata>, 



juxta apicem haud dentatce, ut in genere Rhinotmeto, sed sinuate. 



Labrum transversely subcircular, narrower than the head. 

 Mandibles robust, with a slight tooth-like prominence at their 

 inner surface, concealed. 



Maxillary palpi (Tab. II. fig. 3 m) elongate, the second joint being 



* Terpa (^reannpes), quatuor ; ywvia, angulus. 



