388 CLASS INSECTA. 



This tribe will comprehend exclusively, as we have said 

 above, the genus 



HiSTEE. 



M. le Baron Paykull has confined himself to detach from 

 it some species with a very flatted form, and with which he 

 has composed that of hololepta. But Dr. Leach (Zool. Misc. 

 III. p. 76.) has established four others. 



Some have the limbs, at least the anterior ones, triangular, 

 and denticulated externally, the antennae always uncovered 

 and free ; the body generally squared, and but little, if at 

 all, inflated. 



They may be divided into two sub-genera. In the first, 

 that of 



Hololepta, Payk. 



The body is very much flatted, the praesternum does not 

 advance upon the mouth, and the four posterior limbs have 

 but a single rank of spines. The terminal lobe of the jaws 

 is prolonged ; the chin is deeply emarginate, and the palpi, 

 proportionally more advanced, are formed of articulations 

 almost cylindrical. 



They remain under the bark of trees. The animal figured 

 by M, Paykull, as the larva of a species of this sub-genus, is 

 that of a species of syrphe or fly. 



The other histeroides, whose prassternum is advanced upon 

 the mouth, whose jaws are terminated by a short lobe, with 

 palpi very little advanced, and composed of articulations, 

 which, with the exception of the last, are rather in the form 

 of an inverted cone than cylindrical, and whose chin, in fine, 

 is slightly emarginate, will enter into the sub-genus of 



HisTER (Proper). 

 Some species, whose fore posterior limbs have, as well as 



