124 GEO. H. HORN, M. D. 



Society have afforded an amount of material wliich had never been 

 properly estimated. Many of the genera will be found mentioned "in 

 the following pages, but only those which seemed to require it and 

 which are but a part of those actually studied. 



Those who know the extent of the subject will properly esti- 

 mate the amount of labor expended and with the hope that the 

 table will prove an incentive to additional work with many improve- 

 ments and emendations, it is presented for the consideration of those 

 interested. 



Mandibles with a setigerous puncture in the groove (scrobe) on the outer side. 

 Antennse slender with at most two basal joints glabrous. The abdominal seg- 

 ments entirely corneous. 

 Last joint of palpi subulate. Mesosternal epimera wide. 



Tribe XXII. Bembidiini. 

 Last joint of palpi slender — -elongate or subcylindrical. Mesosternal ei^imera 



narrow Tribe XXIII. Pogonini. 



Antennae moniliform or slightly compressed externally, four basal joints glabrous. 

 (The abdominal segments 3 — 4 — 5 narrowly coriaceous on their 



posterior margins in Nomius) Tribe XIX.- Nomiini. 



Mandibles without setigerous puncture in the scrobe. 

 Posterior coxae separated, the first ventral segment visible between them. Thorax 

 with setigerous puncture in the hind angle. 

 Suture at base of mentum distinct; margin of elytra interrupted posteriorly. 

 Middle coxse closely approximated or contiguous. 



Tribe XVIII. Ozaenini. 

 Suture at base of mentum entirely obliterated; margin of elytra not inter- 

 rupted and without internal plica. Middle coxse distant. 



Tribe XVII. Siagonini. 

 Posterior coxpe contiguous, (except in Egini.)* 

 A. — Margin of elytra interrupted at posterior third and with a distinct internal 

 plica. 

 Four basal joints of antennpe glabrous, antennro moniliform or slightly 

 compressed. 

 Mesosternal epimera broad ; anterior tibise not dilated ; segments 3 — 4 — 5 

 of abdomen coriaceous posteriorly. Body not pedunculate. 



Tribe XX. Psydrini. 

 Mesosternal epimera narrow; anterior tibios dilated; abdomen entirely 



corneous. Body pedunculate Tribe XXI. Morionini. 



Three basal joints of antenna or less glabrous. 



Head more or less constricted behind the eyes and dilated to a semi- 

 globular neck. Terminal joint of maxillary palpi arising obliquely 



from the preceding joint Tribe XVI. Panagaeini. 



Head not constricted behind the eyes. Terminal joint of the maxillary 

 palpi arising normally from the end of the preceding joint. 



Tribe XXIV. Pterostichini. 



* The Egini can not be confounded with eitlier of the two preceding tribes from 

 the other special characters which they possess. 



