MONOPLATUS. 



TRIBUS I. 



Genus 1 . MONOPLATUS *. (FRONT, figs. 1 <fc 2. TAB. I. figs. 1-4.) 

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



MANDIBUL^ robustce, ad marginem inferiorem dentatce. 

 PALPI MAXILLARES subelongati ; LABIALES robusti. 

 AxtiES'SMfiliformes, art. 1 et 2 ndo subdilatatis. 

 OCULI exstantes, globosi. 



CAPUT leviter productum, antice subattenuatum, in $ transversum, 

 latum, in 3 constrictum. 



THORAX transversus, angulis anticis subdepressis, lateribus marginatis, 

 rectilinearibus, ad basin transverse foveolatus, impunctatus fere, 

 et glaber. 



ELTTBA sat lata, subcylindrica, ante medium plus minusve oblique 



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



lorata. 

 PEDES robusti; tarsi anterior es breves, dilatati; femora posterior a in- 



crassata, oblique truncata ; tibice robustce, longitudinaliter mar- 



ginatce, et apicem juxta dentatce. 



Mas Tiabet 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 & 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 & 2 n) : 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 



* fiovos, solus ; TrXarvs, latus. 



