278 Mr. D. Sharp's Contributions to the 



evenly curved behind the prominent eyes towards the 

 vertex ; the colour is pitchy, the surface quite opaque, 

 densely j)unctured with unibilicate punctvires, more indis- 

 tinct towards the front ; the interstices very fine, the vertex 

 in the middle Avith an obscure, longitudinal imjn'cssion. 

 Thorax only half as broad as the elytra, nearly twice as 

 long as broad ; the greatest breadth about the middle, 

 thence much narrowed towards the front and slightly 

 towards the base ; along the middle with two deep, longi- 

 tudinal furrows ; the colour similar to that of the head, as 

 also the punctuation, but the latter not quite so distinct. 

 El}'tra quite as long as the thorax, of an obscure fuscous 

 colour, with some very indistinct paler spaces at the bas(>, 

 densely punctured with a distinct scabrous punctuation. 

 Hind body with the basal segments roughly and coarsely 

 punctured, the apical ones nearly smooth. Legs pale 

 yellow. 



Tapajos ; a single individual, of doubtful sex. 



Obs. — In the form of the head this species is interme- 

 diate between £. boops and E. sirjnatus ; the individual 

 described bears a transverse impression on the middle of 

 the head, which I have not mentioned in my description, 

 as I think it is the result of accident. 



6. Echidster mamillatus, n. sp. Infuscato-rufescens, 

 elytrorum fxscia lata basali, antennis ])cdibusque tostaccis ; 

 opacus, dense punctatus ; capite angusto, vertice elongato, 

 subtus pone orem bimamillato ; thorace minus elongato, 

 latins bisulcato. Long. corp. 2 lin. 



Rather narrow. Antenna reddish-yellow ; 1st joint very 

 stout, rather short ; 2nd joint stout, bead-like, not longer 

 than broad ; 8rd joint small, 5 — 10 each a little broader than 

 its predecessor, 7 — 10 transverse ; 11th joint rather stout, 

 oblique at the apex. Mandibles red, very slender, only 

 moderately long. Teeth of labrmn short and indistinct. 

 Head infuscate-red, about as broad as the thorax ; the sides 

 convergent, the vertex forming a neck ; the surface densely 

 and obscurely punctured, convex between the eyes. Thorax 

 longer than broad, much narrower than the elytra, rather 

 irrcgulai" in form, with a rather obscure elevation along 

 the middle, and another still more obscure on each side 

 of this; colour and sculpture similar to that of the head. 

 Elytra longer than the thorax, blackish at the apex, the 

 basal part yellow, this colour forming an angulated fascia, 

 which occupies nearly half of the elytra; densely aspcrately 



