2 MONOPLATUS. 



TRIBUS I. 



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

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



MandibuljE robustce, ad marghiem inferiorem dentatce. 

 Palpi maxillares subelongati ; labiales robusti. 

 Axtenx&JW formes, art. 1™° et 2 nd " subdilatatis. 

 Oculi exstantes, globosi. 



Caput leviter productum, antice subattenuatum, in $ transversum, 

 latum, in <$ constrictum. 



Thorax transversus, angulis anticis subdepressis, lateribus marginatis, 

 rectilinearibus, ad basin transverse foveolatus, impunctatus fere, 

 et glaber. 



Elytra sat lata, subcylindrica, ante medium plus minusve oblique 

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

 lorata. 



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

 crassata, oblique truncata ; tibia? robust^, longitudinaliter mar- 

 ginatum, et apicem juxta dentatai. 



Mas habet antennas longiores, caput brevius, ocidos 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 tbird 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«&2»): the first joint rounded at tbe 

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

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



Antennos 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-tbird 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 



* fioroi, solus ; nXciTvs, latus. 



