2 MONOPLATFS. 



TRIBUS I. 

 Genus 1. MONOPLATUS*. (Front, figs. 1 & 2. Tab. I. figs. 1-4.) 

 Dej. Cat. ed. 3. 1837, p. 407. 



Mandibtjl^: robusta*, ad marginem inferiorem dentatce. 



Palpi maxillabes subelongati ; labiales robusti. 



Antenna filiformes, art. I" 10 et 2 nd0 subdilatatis. 



Octtli exstantes, ghbosi. 



Caput leviter productum, antice subattenuatum, in $ transversum, 



latum, in c? constrictum. 

 Thorax transversus, angidis anticis subdepressis, lateribusmarginatis, 



rectilinearibus, ad'basin transverse foveolatus, impxmctatus fere, 



et glaber. 

 Elttba sat lata, subcylindrica, ante medium plus minusve oblique 



depressa, punctato-striata plerumque, vel punctata; scepe co- 



lorata. 

 Pedes robusti; tarsi anteriores breves, dilatati ; femora posteriora in- 



crassata, oblique truncata ; tibice robustce, longitiidinaliter mar- 



ginatat, et apicem juxta dentatae. 

 Mas habet antennas longiores, caput brevius, oculos globosos et 

 prominentes, elytra parallela subattenuata, tarsosque ad basin di- 

 latatos. 



Labrum transversely subrotundate. 



Mandibles robust, deflected at the apex into a sharp, acute, 

 double point; at the inner margin (immediately below the apex) 

 is a single well-defined tooth, formed by a double depression in the 

 surface. 



Maxillary palpi (Front, figs. 1 m k 2 m) subelongate ; the second 

 joint long, narrow, obliquely truncate ; the third short, ovate ; the 

 apical joint longer than the second, and nearly as long as the third, 

 subacute at its extremity. 



Labial palpi (Front, figs. 1 n & 2ri) : the first joint rounded at the 

 apex ; the second broad and short ; the apical considerably narrower 

 than the second, equal to it in length, and subacute. 



Antennae approximate, situated immediately below the inner mar- 

 gin of the eyes, tolerably robust, filiform ; in the males equal in 

 length to that of the elytra, in the females shorter by one-third than 

 the elytra ; the first joint broad, gradually dilated, and reflected 

 outwards ; the second short, ovate ; the third as long as the first, 

 more attenuated than the second ; the fourth very slightly longer 



* fiovoe, solus ; nXarvs, latus. 



