498 CLASS INSECTA. 



truncated and excavated in front. The head of the males is 

 provided with a horn. 



SiNODENDRON, Fab.* 



The knob of the antennae is formed by the last three arti- 

 culations. 



Those whose body is thick, convex, ovoid, with the man- 

 dibles like a compressed pincers, and rising vertically in the 

 males ; the head much more narrow than the corslet, mea- 

 sured in its greatest breadth ; and the legs, or at least the 

 two anterior ones, broad, and in the form of an inverted 

 triangle, form two sub-genera. 



iEsALus, Fab., 



In which the mandibles, even in the males, are shorter than 

 the head, and terminate above in the manner of a horn ; in 

 which the chin conceals the jaws ; whose tongue is very small ; 

 whose body is short and gibbous, with the head almost en- 

 tirely received in the emargination of the corslet, the legs 

 compressed, triangular, and the sternum simple, and without 

 projection. (jEsalus scarabcEoides, Fab. Panz. Faun. Insect. 

 Germ. XXVI. 15, 16.) 



Lamprima, Latr., 



In which the body is more elongated, with the mandibles 

 much longer than the head, in the males, in the form of ver- 

 tical angular laminae, very much denticulated, and hairy 

 internally ; the jaws uncovered as far as their base ; the 



* ScarabcEus cylindricus, Lin. Oliv, Col. I. 3, ix. 88. It is the only 

 known species ; the other sinodrenda of Fabricius, belong to other 

 i;enera. 



