CARABIDAE. 13 



Fnnit dcrtcxed, head with two suiDra-orhital setre, spurs of anterior tihiaj 

 terraiiial. Elytra with ocellate fove;e, not margined at base. 



Opisthius. 



Front horizontal, liead with one supra-orbital seta. Elytra margined at 



base. 



Anterior tibise very obliquely truncat<', the inner spur above the apex : 



vertex sulcate. Notiophilus. 



Anterior tibiae scarcely obliquely truncate, spurs terminal. 



Mandibles explanate at the sides, maxillte at base with spine-bearing 



processes. Leistiis. 



Mandibles stout, not explanate, maxillae without processes and merely 



setose at base. 



Anterior tarsi of male feebly dilated. Nebria. 



Anterior tarsi of male broadly dilated. Pelophila. 



In addition to tlie peculiarities already mentioned it might be 

 observed that all the genera above mentioned (except Notio- 

 philus) place their antennsB backward over the body in a more 

 or Icss^ curved position when in repose, while in Notiophilus the 

 antenniB are bent down under the head and encircle the margin 

 of the eye. 



The affinities of this tribe are more marked in the direction of 

 the Elaphrini than elsewhere, and it may be especially observed 

 that while all those characters which separate Ojnsfhi us fvom the 

 other genera are found in EJaphrus, the ligula and paraglossai 

 of these two genera are also similar. 



Tribe VTII.— METRII^I. 



Antennae moderate in length, straight, arising under a distinct 

 frontal margin ; first four joints glaln-ous, the first joint stouter 

 but not longer than the third, 5-11 suljequal, pub(!scent. Eyes 

 small, round, distant beneath from the buccal opening. Head 

 with a single setigerous puncture over the middle of each eye. 

 Labruni short, feebly bisinuate. Mandibles short, concave on 

 the outer side and with a distinct setigerous puncture. Mentuin 

 transverse, broadest at middle, deeply emarginate and with a 

 rather stout, bifid tooth ; epilobes distinct, mental suture well 

 marked. Ligula broad, ol)tuse and bisetose at tip, the para- 

 glossic distinct and adherent in their entire length; palpi rather 

 stout, the last two joints of nearly equal length, the second bise- 

 tose in front, the thirrl broader to a]>ex and truncate. Maxillae 

 with inner lolje rather short, distinctly hooked at tip and ciliate 



