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THE ENTOMOLOGIST. 



author is to be separated from natator. With regard to the 

 question of the specific identity of suffrlani and natator, the 

 views of M. de Borre are scarcely likely to be largely adopted. 

 Such matters as these might be well decided by a reference to 

 the male genitalia. 



Table of Species. 



1 (4). Under side wholly testaceous. 



2 (3). Scutellum with a broad well-defined keel at 



the base. Upper side dull ... ... 1. minutus, Fab. 



3 (2). Scutellum simple. Upper side very shiny 2. urinator, 111. 



4 (1). Under side wholly or in greater part black. 



5 (6). Punctures of the inner stria? becoming 



stronger towards the base 



6 (5). Punctures of the inner striae becoming 



finer towards the base, or uniform. 



7 (16). Eeflexed margins of thorax and elytra 



testaceous. 



8 (11). Interstices sculptured. 



9 (10). Interstices closely and very finely punc- 



tured ... ... ... ... ... 4. colymbus, Er. 



caspius, Sharp ; Regimbart, pars ; Fowler, pars 

 nee Men., nee Aube. 



3. suffriani, Scrib. 



10 (9). Interstices transversely sub-strigose 



11 (8). Interstices smooth. 



13 (13). Form ovate. Length of elytra one-seventh 



(?) to one-fourth (cf ) greater than their 



joint width 



13 (12). Form oblong-ovate, or even elongate and 



compressed. Length of elytra one-third, 

 or more than one-third, greater than 

 their joint width. 



14 (15). Average size smaller. Outer apical angle of 



elytra obtuse but evident. Mesosternum 

 and apex of abdomen rufo-testaceous. 

 Dorsal aspect of median lobe of cedeagus 

 strap-shaped, slightly narrowed to its 

 broadly rounded apex, a little below which 

 its sides are very slightly concave 



15 (14). Average size larger. Outer apical angle of 



elytra completely rounded off. Meso- 

 sternum and apex of abdomen black. 

 Dorsal aspect of median lobe of cedeagus 

 elongate-triangular, somewhat attenuate 

 in its apical half, apex sub-acute 



16 (7). Reflexed margins of thorax and elytra 



nigro-seneous. 



... 5. striolatus, Fowler. 

 colymbus, Sharp ; nee Er. 

 caspius, Regimbart, pars ; 

 nee Men., nee Aube. 



6. natator, Scop. 



7. elongatus, Aube. 

 distinctus, Sharp. 



8. bicolor, Payk. 



