270 CYRTOX. 



verse, slightly elongated in front ; below the base of the antennae arc 

 two oblique carinations extending downwards to the margins of the 

 labram ; at the sides of the base of the antennae arc two broad and 

 shallow depressions extending to the inner margins of the eyes, 

 while immediately above the base is a medial longitudinal fovea, 

 short and abrupt, which terminates in a broad and obliquely mar- 

 gined depression extending to the upper and inner margin of the 

 eyes ; thus the character of the letter T or of Y is formed (very 

 distinct from the cruciform depression of C. anisotomoides) : the eyes 

 are large and globose, lateral, situated near to the base of the 

 head ; the surface (when viewed under a high power) is very finely 

 punctate ; the colour of the apex is flavous. Thorax broad, much 

 broader than the head, transverse, narrow ; the anterior margin is 

 distinctly emarginate (more so than in C. anisotomoides) ; the anterior 

 angles are obtuse and depressed ; the sides are finely and evenly 

 marginate, their outline being subsinuate, and in front subconstricted ; 

 parallel to, and at a short distance from the marginatum is a broad and 

 distinct longitudinal depression ; the surface throughout is impunc- 

 tate and glabrous. Scutellum large, triangular, impunctate. Elytra 

 considerably broader than the thorax, globose, and (when viewed 

 under a high power) very minutely striate-punctate : in C. anisoto- 

 moides distinct striae may be traced, and the punctures are consider- 

 ably broader and deeper. Antenme short, robust, clavate ; the first 

 joint long, attenuated at the base and incrassated at the apex ; the 

 second short and globular ; the third longer than the first, attenu- 

 ated at the base ; the fourth and fifth broad, and almost as short as 

 the second ; the sixth equal in length to the. fourth and fifth united • 

 the rest short and dilated, the eleventh or terminal joint being 

 attenuated at the apex : in colour, the joints one to six are flavous, 

 seven to ten dark fuscous, and the eleventh flavous. Legs : the an- 

 terior flavous, suffused, especially on the upper margin, with rufous : 

 the posterior femora are broadly dilated ; at the apex, immediately 

 below the insertion of the tibiae, are two tooth-like spurs ; in colour 

 rufous. 



This species is abundantly distinct from 0. anisotomoides, not only 

 in the distinct colouring (bright rufous (slightly flavous) instead of 

 testaceous or testaceo-rufous), but in the form of the markings of the 

 head, in its thoracic longitudinal marginal depression, and in the 

 total absence of any striation on the elytra. 



Taken by Mr. Bates in the neighbourhood of Ega, in the district 

 of the River Amazon. 



