Sua: 



278 Mr. D. Sliaq/s Contributiuns to the 



evenly curved behind the prominent eyes towards the 

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

 densely ])uiictuved with iimbilicate punctures, more indis- 

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

 in the middle with an obscure, longitudinal im])rcssion. 

 Thorax only half as broad as the elytra, nearly twi(;e 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 vsimilar to that of the head, as 

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

 Elytra quite as long as the thorax, of an obscure fuscous 

 colour, with some very indistinct paler spaces at the base, 

 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 E. boops and JE. signatus ; 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. Echiaster mamillatus , n. sp. Infuscato-rufescens, 

 elytrorum fascia lata basali, antennis pedibusque testaceis ; 

 opacus, dense punctatus ; capite angusto, vertice elongato, 

 subtus pone orem bimamillato ; thorace minus elongato, 

 latins bisnlcato. Long. corp. 2 lin. 



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

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

 than broad ; 3rd joint small, 5 — 10 each a little broader than 

 its predecessor, 7 — 10 transverse ; 1 1th joint rather stout, 

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

 moderately long. Teeth of labrum short and indistinct. 

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

 convergent, the vertex forming a neck ; the sm'face densely 

 and obscurely punctured, convex between the eyes. Thorax 

 longer than broad, much narrower than the elytra, rather 

 irregular 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 asperately 



