41 



A. similata.—Legs with (generally) the tibiae and tarsi red. Sometimes 

 the legs are entirely black, but the species can then be easily distinguished 

 from ovata by being narrower and not so flat as the latter. The posterior 

 angles of the thorax are right angles, whereas in ovata they are acute. 

 2. Apical spine of the anterior tibiae with three points. 



A. strenua. — Length 4 lines. Striae of the elytra distinctly punctured ; 

 base of the thorax with one impression at each side. 



A. plebeia. — Length 3 lines. Striae of the elytra nearly without punctures ; 

 thorax two small impressions at each side of the base. 



Of the above species (from tibialis), familiaris, trivialis, communis, simi- 

 lata, and plebeia are common everywhere ; tibialis occurs in sandy situations, 

 as on coast sandhills ; lucida occurs less commonly, but in similar situations ; 

 while acuminata, spreta, curta, lunicollis, ovata, and strenua are fairly dis- 

 distributed, generally occurring singly or in pairs, and not in such abundance 

 as such species as communis or familiaris. Continua which has been recently 

 added to the British fauna, seems to have occurred in fair numbers to different 

 collectors, by whom it has been mistaken for communis. 



ZABRUS. 



Z. gibbus. — This species, which is easily recognised from the description of 

 Zabrus in the analytical table of genera, is common but somewhat local, 

 occurring occasionally in great abundance on the unripe ears of corn on 

 which it feeds by night. In length, it measures slightly over half-an-inch. 



There yet remain to be described the species of the family Trechidae, and 

 of the genera Patrobus and Pogonus, which I have included in the second 

 (B.) division of the Feronidae, in the analytical table of genera, on pages 26 

 to 28, and which are there distinguished from the other Feronidae (except the 

 genera Licinus and Panagceus) by having only two joints of the male anterior 

 tarsi dilated. Both the Pogonidae (including Patrobus) and the Trechidae 

 are usually placed between the Harpalidae and the Bembidiidae, the species 

 of the Trechidae exhibiting a general resemblance to the " Bembids," and one 

 genus, Perileptus, having the apical joint of the palpi somewhat needle- 

 shaped, a peculiarity of structure almost peculiar, among the Carabidae, to 

 the Bembidiidae. 



PATROBUS. 



The species of this genus, which are three in number, are easily recognised 

 by their elongate form, by their mostly pitchy upper surfaces, red legs, and 

 by the thorax being distinctly narrowed behind and possessing a deep pit or 

 depression at each side of the base. The three species, P. excavatus, P. assi- 



