134 GEO. H. HORN, M. D. 



such complete fusion of the two pieces as in Callistus where the suture 

 is not at all visible. In the former genus the suture is plainly evident 

 if the under side is examined and not visible on the upper as shown 

 in figure 38. 



The serrate claws of Elaphropus Motsch., is a very singular cha- 

 racter to occur in the present tribe, that it does occur I have assured 

 myself by the examination of a specimen which I owe to the liberality 

 of Dr. Dohrn. The species of this genus resemble Tacliys and notably 

 incurvus, etc. 



The genera known to occur in our fauna are as follows : 



Anterior tibiae not obliquely truncate at apex. Sutural stria not recurved at apex. 

 Eyes large or moderate. 



Elytra punctured without strise, surface finely pubescent Tachypus. 



Elytra striate or striato-punctate, glabrous Bembidium. 



Eyes entirely wanting Ailillus. 



Anterior tibise obliquely truncate at apex. Sutural stria recurved at apex. 



Elytra with the eighth stria interrupted or less deep at middle Tachys. 



Elytra with the eighth stria very deep Pericompsiis. 



With Bembidium I include Li/mnaeum and also for the present 

 Amerizus Chaud. (Rev. Mag. Zooh 1868). The latter genus was 

 founded on Trechus spectahilis Mann., from the peculiar structure of 

 the outer maxillary lobe. Beneath his generic description Chaudoir takes 

 occasion to refer Trechus ohlongulus Mann., to the genus Lymnseum, 

 as an aberrant species. On dissection I find the outer maxillaiy lobe 

 probably more completely consolidated than in the true Amerizus. 

 Rather than recognize a genus with two so dissimilar species I think 

 it better to ignore the character and refer both to Bembidium where 

 each will find better associates. It is well known that the mouth parts 

 in Bembidium vary otherwise to an extent which would be considered 

 generic in other parts of the series but all attempts to divide it have thus 

 far been unsuccessful, the characters becoming evanescent. 



Tachypus is however capable of feeble definition but the general 

 appearance of the species is so distinct that it seems preferable to 

 retain it. 



Tacliys and Pericompsus should probably be united the characters 

 separating the latter being rather those of a group of species than 

 a genus. 



After placing at the head of the present series those tribes which 

 appear to link the aggregate Carabinge and Harpalinse, the present tribe 

 should then follow as that which most intimately connects a particular 

 tribe (Elaphrini), of the former with the latter. Next in order follow 

 naturally the Pogonini and Pterostichini. 



