122 ADEPHAGA. [Tachyptis. 



1. Thorax at least as long as broad ; femora metallic on 

 upper surface; first or first aud second joints of antennas 



bronze green; size larger T, VAJ. J aves, Du/L 



2. Thorax broader than long; femora entirely testaceous; 

 antennae with four or five basal joints entirely testaceous; 



size smaller T. FLAVIPES, L. 



T. pallipes, Duft. Upper side coppery bronze, elytra spotted with 

 metallic green or purple, especially at sides ; head and thorax rugose, 

 the latter finely punctured on disc ; antennte with the basal joint and 

 part of the second, at all events above, bronze green, third, fourth, and 

 sometimes fifth testaceous, the rest fuscous ; thorax as long as broad, 

 with sides rounded in front and rather gradually contracted behind, 

 posterior angles right angles, minutely projecting, dorsal furrow slight, 

 basal fovese small ; elytra exceedingly finely and minutely punctured, 

 clothed sparingly and irregularly with asliy pubescence, especially at 

 sides, striae faintly indicated on disc, third interstice with two large 

 deep pores ; legs testaceous. L. 5-6 mm. 



Banks of rivers and streams ; very local, and by no means common, although it has 

 been taken in some numbers in a few localities ; Preston, Lancashire ; Swansea ; Nor- 

 folk ; Colchester ; banks of the Till and Irthing in the Northumberland district. 

 Scotland, rare, Solway, Moray, Clyde. 



T. flavipes, L. Upper side coppery or greenish bronze ; much 

 smaller than the preceding ; base of the antenna? entirely testaceous ; 

 thorax short, with sides more strongly contracted behind middle than in 

 T. pallipes ; the sculpture also of the whole upper surface is coarser ; the 

 elytra are duller and less brightly coloured, with more evident and 

 closer pubescence. L. 4-4:| mm. 



Common and generally distributed from the Midlands southward ; less common to- 

 wards the north ; Scotland, not common, Lowlands ; Ireland, Killiney Beach, 

 Kingstown, and other localities ; it is found on the banks of rivers and streams, aud 

 also in damp places beneath moss, stones, dead leaves, &c. 



TRECHINA. 



This tribe contains several genera which differ very widely from one 

 another, and seem at first sight to have very little in common except that 

 they have the first two joints of the anterior tarsi dilated in the male ; 

 the genera Aepus and Perileptus, for instance, are very ditierent from 

 Trechus, and all three appear to be widely separated from Patrobus and 

 Pogonus; the two first-mentioned genera, however, show a decided 

 affinity with the Bembidiina, so much so that it is very doubtful whether 

 Perileptus at all events ought not to be classed with that tribe ; Aepus 

 shows a connection with Trechus; and Pogonus (with which Patrobus must 

 provisionally be classed) exhibits a decided leaning towards Bemhidiuni, 

 certain species of which, e.g. B. oigijptiacum and B. pygmwum, are very 

 like species of this genus : the real afiinity, however, between the two 

 genera lies in the genus Octhozetus (from the Pampas), which is a close 

 connecting link between Po(iona!s and the Bradeon section of Bemhidiam. 



