AMERICAN COLEOPTERA. 139 



longer and the penultimate merely bisetose, the mandibles are decidedly 

 sulcate in the first series (species 1 — 12), and often very feebly so in 

 the second, (species 13 — 25, Synopsis loc. cit.). 



The carination of the ligula has no value as a generic character, in 

 fact the carinate ligula occurs in many places in Pterostichus, (varying in 

 degree), especially in the flatter species from the Pacific region. 



The manner of the dilatation of the tarsi in Loxandrus serves to 

 separate it sufficiently in a group where the characters are so feeble. 



The plurisetose second joint of the labial palpi, and its consequently 

 greater length than the third, serves to separajte Amara from all the 

 other genera except the first or genuine series of Evarthrus. 



The mentum tooth seems also to have lost value as many Pterostichus in 

 Europe have an obtuse tooth as in our submarginatus, while it appears to 

 have escaped notice that P. honestus Say, has a rather long acute tooth. 



While retaining M^as and Loxandrus as distinct on characters which 

 are undoubtedly valid the other genera require some modification. 



The following table represents the conclusions which I have arrived at ; 



Terminal joint of palpi dilated. Elytra without dorsal puncture Mjas. 



Terminal joint of palpi cylindrical or slightly oval. 

 Anterior tarsi of male normally dilated. 



Terminal joint of palpi as long as or longer than the penultimate, the latter 



bisetose in front Pteroslichiis. 



Terminal joint of paljii shorter than the penultimate, the latter ))Iurisetose 

 in front. 



Elytra with ©ne dorsal puncture Evarflirus. 



Elytra without dorsal puncture Amara. 



Anterior tarsi of male obliquely dilated liOxaiidnis. 



By this arrangement Holciophorus, Lophoglossus, Piesmus and the 

 second series of Evarthrus revert to Pterostichus. Amara is intended 

 in its most comprehensive sense although some of its groups have 

 characters of apparently greater value than those used above in the 

 separation of genera. Loxandrus is the nearest approach in our fauna 

 to the Trigonotomi». 



Tribe XXV.— Licinini. 



Antennae slender, moderately long, arising under a distinct frontal plate, the 

 three basal joints glabrous (two in Badister). Head short, moderately stout, witli 

 two supra-orbital setse, clypeus short not prolonged between the mandibles, emar- 

 ginate and exposing the basal membrane of the labrum, with a setigerous ptine- 

 ture in each angle. Labrum usually short, emarginate, longitudinally impressed. 

 Eyes moderate in size not very distant from the mouth except in Diccelus where 

 they are small and very distant. Mandibles stout more or less arcuate, tips usually 

 obtuse except in Diccehis where they are feebly arcuate and acute. Maxillse hooked 

 at tip ciliate within, the outer lobe rather slender, biarticulate, the palpi moderate 

 in length, the last joint variable in form. Mentum deeply emarginate without 



