Staph ylinido' of the Amazon Yulhy. 385 



■\vitli the front angles distinctly prominent ; snrface of 

 head shining, rather coarsely pimctured, with a smooth 

 space in front of the vertex ; over the eyes the pnnctures 

 become strig-ose. Thorax abont as long- as it is broad in 

 front; the sides gently narrowed to the base, the angles 

 obtuse, and, owing to the base being distinctly curved 

 near the angles, appearing somewhat rounded ; the surface 

 shining, rather coarsely and not very sparingly pimctiu-ed. 

 lillytra scarcely longer than the thorax, shining, with rather 

 coarse, elongate, distinct punctures. Hind body above 

 with a few obsolete punctures, which are most numerous 

 and most visible on the 6tli and 7th segments; these seg- 

 ments are besides very finely strigose, so as not to be 

 shining. The sculpture of the ventral plate of the 7th 

 segment similar to that on the dorsal plate, viz., some 

 coarse but obsolete, sparing, elongate punctures, the sur- 

 face besides being finely and densely strigose, so as to 

 be opaque ; the 6th segment beneath is also scarcely 

 shining, and with some coarse, scattered punctures. 

 Mesosternum strongly carinate. 



St. Paulo ; a single individual, which I consider to be 

 a female. 



Ohs. — This species is remarkable by reason of the com- 

 parative large development of the upper tooth on the 

 right mandible. 



o 



6. Osorius affinis, n. sp. Angustulus, nigro-piceus, 

 antennis pedibusque rufis ; clypeo antice siibtruncato ; 

 capite thoraceque coriaceis, subnitidis, sat fortiter punc- 

 tatis, hoc angulis posterioribus obtusis ; elytris minus 

 discrete punctatis ; abdomine segmentis 6° et 7'^ minus 

 profunde punctatis. Long. corp. 3| lin. 



Head rather small, Avith the eyes distinctly convex ; the 

 clypeus nearly truncate in front, the antennal tubercles 

 distinct ; the surface distinctly coriaceous, so as to be but 

 little shining, with coarse but shallow, elongate punctures, 

 wdiich pass into rugfe over the eyes, and are wanting in 

 front of the vertex. Thorax about as long as it is broad 

 in front, the lateral margin fine throughout; the sides 

 gently narrowed towards the base, slightly sinuate in front 

 of the hind angles, Avhich are therefore distinct, and are 

 obtuse ; the surface coriaceous, and sprinkled Avith rather 



TRANS. ENT. SOC. 1876. — PART II. (jUNE.) C C 



