Coleopterological Notices, IV. 4(j5 



sion, in the middle of which there is an erect transverse row of long 

 acute spiniform teeth, the surface being perfectly smooth and normal 

 in the female ; there are doubtless many other special sexual cha- 

 racters of equal singularity among the tropical species ; one of these 

 will be noted under the genus Madarellus. 



The thirty-nine genera which seem to be necessary for our species 

 may be recognized as follows: — 



Fygidium more or less completely exposed in both male and female, and 

 generally almost vertical 2 



Pygidium oblique and entirely concealed in the female, sometimes with the 

 mere apex exposed especially in the male, except in Centrinogyna, where 

 it is vertical and completely exposed in the male 17 



H — Antennal club shorter, more robust, ovoidal or conoidal and more or less 

 pointed, never fully as long as the preceding six joints combined ; pygi- 

 dium nearly vertical, except in the male of Madarellus ; tibiae usually 

 longitudinally and feebly fluted and externally subcarinate 3 



Antennal club elongate, densely pubescent, longer than the preceding six 

 joints combined ; pygidium rather oblique ; anterior coxfe narrowly sepa- 

 rated ; presternum more or less impressed along the middle, but never 

 abruptly sulcate ; tibiae nearly smooth ; claws free, divergent 16 



3 — Tarsal claws free and more or less divergent 4 



Tarsal claws connate at base, nearly parallel or feebly and gradually everted 

 toward apex 13 



4 — Second funicular joint short or moderate in length, never as much as twice 

 as long as wide 5 



Second funicular joint elongate, more than twice as long as wide and fully as 

 long as the next two combined 12 



5 — Anterior coxae more or less approximate, never separated by a distance 

 equalling their own width 6 



Anterior coxae remote, the prosternum generally broad and flat between and 

 before them 11 



g — Prosternum never deeply and abruptly sulcate, although frequently feebly 

 impressed along the middle 7 



Prosternum narrowly, abruptly and deeply sulcate 10 



7 — Beak separated from tlie head by a shallow impression which is often 

 broadly angulate when viewed in profile 8 



Beak separated from the head by a fine deep and abrupt groove ; basal joint 

 of the antennal club forming about one-half of the mass, more or less 

 sparsely pubescent and shining 9 



8 — Antennal club polished and subglabrous toward base Baris 



Antennal club finely and densely pubescent throughout; species generally 

 minute and with scattered white scales, especially dense on the meso- 

 and metasternal side-pieces and at the sides of the last three ventral seg- 

 ments Plesiotoaris 



