420 Mr. D. Sharp's Contributions to the 



sides, covered Avitli fine, straight, longitudinal, elevated 

 lines. Legs slender. 



St. Paulo ; a single individual. 



Ohs. — I have also in my collection an individual of this 

 species, which was captured by jNlr. Scpiires near liio de 

 Janeiro. 



Leptochirus. 



1 find that considerable confusion exists both as to the 

 generic characters and the specific forms represented by 

 the name LejAochirus. There are, it seems to me, two dis- 

 tinct forms confounded imdcr the generic name, viz., one 

 in which the anterior cox;\i are separated by a well-deve- 

 loped process of the prosternum, and another in which this 

 process is absent ; L. scoriaceus, and all the Amazonian 

 species here described, belong to the first of these groups, 

 as do also L. Inticeps and other S]iecies from the tropics of 

 the Eastern hemisphere. On the other hand, a large 

 number of the Eastern species, such as L. eheninus and 

 L. mandihuluris, have the front coxa3 comparatively elon- 

 gate and exserted, and the division between their cavities 

 quite concealed, so that it is probable they will ultimately 

 be considered generically distinct; it is to this latter group 

 that the L. bicornis, Fauv., from Mexico, should be 

 referred. 



The species of the genus as yet described from the New 

 World are only seven in number, but they are in reality 

 more numerous than has been supposed, for I have at 

 least a dozen nndescribed species from this part of the 

 globe in my own collection. The species, are, however, 

 very difficult to distinguish, from their great similarity, 

 and demand a careful study before their distinctions can 

 be satisfactorily elucidated. I Cim only satisfy myself as 

 to four distinct species from the Amazons, two of which 

 I here describe as new. 



1. Leptocliirus foiitensis, n. sp. Xigerrimns, nitidus, 

 fronte bi-impressa, clypeo oblique declivo, utrinque acute 

 tuberculato, pone tuberculam bipvmctato ; abdomine supra 

 fere impunctato. Long. corp. (extenso) 8 lin. 



Antennas 2 lin. in length; 10th joint scarcely so long as 

 broad. Head with the two frontal impressions without 

 punctures, or rather each with two very indistinct punc- 

 tures; clypeus descending obliquely from the front, with an 



