Staplii/linidoi of tJie Aiuazoii Valley. 251 



thorax, and about as broad as the elytra, nearly straight 

 at the sides; the vertex distinctly emarginate, and with a 

 small distinct fovea in the middle, the surface extremely 

 finely and densely (but not quite so indistinctly as the 

 head and thorax) punctured ; the eyes small. Thorax 

 longer than broad, distinctly narrower than the elytra; its 

 greatest breadth much in front of the middle, much nar- 

 rowed to the front, but only slightly towards the base ; the 

 surface very obsoletely punctured, so as to be a little 

 shining, with faint indications of two foveas at the base in 

 the middle. Elytra only slightly longer than the thorax, 

 extremely finely and indistinctly punctured, depressed at 

 the scutellum. Hind body very finely and indistinctly 

 punctured, a little dilated towards the extremity. Legs 

 yellow, short and stout; the tarsi short, the anterior ones 

 particularly short and broad. 



Tapajos ; a single female. 



Obs. — I have not been able to examine the mandibles 

 and labrum of this obscure little species ; so far as general 

 appearance goes, it may be said to be closely allied to the 

 European *S'. minimus. 



4. Scopaus chloroticus, n. sp. Pallide testaceus, an- 

 gustulus, subparallelus, subnitidus, minus pubescens ; 

 thorace lateribus parallelis, angulis anterioribus rotundatis, 

 crebre subtiliter punctato, linea lata media laevigata ; elytris 

 thorace paulo longioribus, albidis, vix perspicue punc- 

 tulatis, nitidulis. Long. corp. | lin. 



Antenna yellow, shorter than head and thorax, slightly 

 thickened towards the extremity; 1st joint stouter than 

 2nd, rather longer than 2nd and 3rd together ; 2nd joint 

 short ; 3rd joint rather shorter and narrower than 2nd ; 

 4 — 7 bead-like, differing little from one another, 8 — 10 

 transverse; 11th joint short. Head rather long and 

 narrow, the sides about parallel, the vertex nearly straight, 

 the angles much rounded; the surface obsoletely and not 

 densely punctured, and with a broad longitudinal line 

 along the middle smooth. Thorax a good deal longer 

 than broad, the sides parallel, the front angles rounded in 

 a gentle curve continuous with the front ; the surface 

 obsoletely and not densely punctured, with a broad space 

 along the middle smooth. Elytra distinctly broader, and 

 a little longer, than the thorax, very pale yellow, their 

 pvmctiiation scarcely visible. Hind body parallel, densely 



