104 GEO. H. HORN, M, D. 



The following table gives in brief the characters which separate 

 the tribes : 



Posterior coxse attaining the side margin of body. Anterior coxal cavities open be- 

 hind. Mandibles with setigerous puncture Tribe II. TrachypacMni. 



Posterior coxse not attaining the side margin of body. 

 Anterior coxal cavities open behind. 



Posterior coxse separated. Labrum bifurcate ....Tribe III. Cychrini. 



Posterior coxse contiguous. Labrum not bifurcate. 

 Mandibles without setigerous puncture externally. 



Spurs of anterior tibise terminal Tribe IV. Carabini. 



Inner spur above the outer. 

 Outer apical angle of anterior tibise prolonged. First antennal joint moder- 

 ate Tribe V. Pamborini. 



Outer angle not prolonged. First antennal joint long Tribe VI. Hiletini. 



Mandibles with setigerous puncture Tribe IX. Nebriiui. 



Anterior coxal cavities closed behind. . 

 Prosternum prolonged and dilated, entirely concealing the mesosternum. 

 Mandibles with setigerous puncture. Scutellum entirely concealed. 



Tribe I. Omophronini. 

 Prosternum not concealing the mesosternum. 

 Antennae free at base. 

 Mandibles without setigerous puncture. Anterior tibise strongly emarginate. 



One supra-orbital seta Tribe VIII. Lorioerini. 



Mandibles with setigerous puncture. Anterior tibise feebly emarginate. Two 



supra-orbital setse Tribe VII. Elaphrini. 



Antennse arising either under a distinct frontal plate or a ridge which extends 

 backward over the eyes. 

 Body not pedunculate, the bases of thorax and elytra in contact. 

 Posterior coxse contiguous. No mandibular seta. Prosternum acute. 



Tribe X. Migadopini. 

 Posterior coxse separated. 



Prosternum prolonged at tip. Mandibles with seta Tribe XI. Metriini. 



Prosternum not prolonged. Mandibles without seta. 



Tribe XII. Mystropomini. 

 Body pedunculate, bases of thorax and elytra remote. 

 Posterior coxse separated. 



Anterior tibise emarginate within, the inner spur remote from the outer. 



Mentum with distinct suture at base Tribe XIII. Promecognathini. 



Anterior tibise obliquely grooved within, the spurs terminal and nearly 

 on the same plane. Mentum closely connate with the submentum. 



Tribe XIV. Enceladini. 

 Posterior coxse contiguous. 



Anterior tibise emarginate within, the outer apical angle prolonged. 



Tribe XV. Scaritini. 



Of the above tribes ten are represented within our faunal limits and 

 but one of these, Metriini, is peculiar to it a.s far as the genera of the 

 sub-family are known to me. 



It is impossible to give these tribes a linear arrangement without 



