ORDER COLEOPTERA. 'SOI 



little concave in the middle. This sub-genus belongs to 

 America.* 



According to Dejean (Spec. II. p. 471), after Pasimachus 

 should follow the genus he has formed under the denomina- 

 tion Scapterus, an East Indian species, which has been 

 communicated to him by one of our most zealous entomolo- 

 gists, M. Guerin, to whom it is dedicated. I am not aware 

 whether the jaws resemble those of the preceding sub-genus, 

 but the body has different proportions ; it is elongated and 

 cylindrical. Their antennae are in proportion shorter than 

 common ; the second articulation is square, a little thicker 

 than the others, which are short, nearly square, and increase 

 progressively. 



The following have the jaws arched, and crooked at the 

 end ; the antennas thickening insensibly toward the top ; 

 the corslet always separated behind, from the base of the 

 elytra, by a space, or a decided re-entering angle. 



Here the exterior palpi are terminated by a sub-cylindrical 

 articulation not pointed at the end. 



ACANTHOSCELIS, Lat. 



Are remarkable by their four hind-legs, which are in the 

 form of an elongated battledore, arched, flat, and a little con- 

 cave on the internal face, convex, and covered with little grains 

 and spines on the opposite side, with the upper surface in- 

 dented, and the posterior teeth large and compressed ; the 

 trochanter of both posterior thighs is very large. 



The body is short, broad, convex above, with the corslet 

 transversal, rounded laterally, sinuous on the hinder edge. 

 The spurs of the fore-legs are very long and the others 

 nearly laminous. 



• Refer to this sub-genus Semites Depressus and Marginatus o[FahT\cius 

 and of Olivier. See the first vol. of the Spec, of Dejean, p. 405 ; the en- 

 tomological observations of M. Bonelli, and the work of Palisot do Beau- 

 vois on the insects collected by him in America and Africa, 



