252 



A REVISION OF THE GENUS JOTOXOMUS (FAMILY 

 CARABIDjE: subfamily FER02^INI). 



By Thomas G. Sloane. 



JVoto7iomus was founded b}'- Baron de Chaudoir (Bull. Soc. Imp. 

 Nat. Mosc. 1865, ii. p. 83) as a subgenus of Feronia; but in the 

 present paper it is assumed to have full generic value. Strictly 

 speaking it seems to be a subgenus of Pterostichus, as are also 

 C eratofevonia* Sarticus and Rhahdotus; if we regard all these as 

 entitled to full rank as genera, and it is certainly convenient to 

 do so, they may be tabulated as follows : — 



Mentum with sinus parallel on sides Cera tofornia 



Mentum with sinus obliquely divergent. 



Prothorax with border narrow, not forming an explanate 

 border to the lateral basal impressions, these never 



spreading to lateral border Xotononius. 



Prothorax with border explanate posteriorly. 



Lateral basal impressions of prothorax broad, deep, 



foveiform Sarticiis. 



Posterior part of prothorax transversely depressed (this 



depressed part reaching the border laterally) PiJiahdotHS. 



JVotono7nus may be briefly diagnosed as follows : — 

 Apterous. Mentum with sides of sinus oblique. Prothorax 

 with border narrow and not forming an explanate margin to the 

 lateral basal impressions. Elytra bordered on base, striate ; 

 interstices not costate or carinate, first with an abbreviated stria 

 at base, third punctiferous. Posterior femora not dilatate towards 

 apex, or channelled on lower side. 



* M. Tschitseherine has recently formed this new subgenus to include 

 Feronia (PterosticJius J rerjalu, Casteln., and P. pJnjhircJius SI. 



