St(ip]ujUni(l<2 of the Amazon Vnllei/. 397 



long as broad, the sides a little rounded, and tlie base and 

 liind angles rounded ; it is of a pitcliy colour and distinctly 

 shining, with a channel along the middle, moderately 

 closely but not very distinctly punctured. Elytra of an 

 obscure-yellowish colour, distinctly longer than the thorax, 

 finely and rather closely punctured. Hind body pitchy, 

 curved at the sides and evidently contracted at the base ; 

 it is shining and almost impunctate. Legs pale yellow, 

 rather slender. 



Rio Madeira, a single individual found by Dr. Trail on 

 the 25th May, 1874; it was attracted by light. 



Ohs. — This is the smallest species of Bledius I have 

 seen ; it is closely allied to B. inuticus and B. similis, but 

 is rather more slender in form, and has the sides of the 

 thorax more curved. 



Trogophlceus. 



Five species of this genus are here described, and only 

 one other was previously known from the Continent of 

 South America ; the genus is one of almost universal 

 distribution, and likely to prove numerous in species even 

 in the tropics. The paucity of species as yet known from 

 South America is pretty certainly, therefore, only the result 

 of neglect on the part of collectors ; several species are 

 known from Cuba, and species of the genus are numerous 

 in Chili. 



1. Troffophloeus mundiis,r\.sp. Niger, dense punctatus, 

 pedibus testaceis, antennarum basi fusco-testaceo ; elytris 

 subtestaceis ; prothorace basi minus discrete bi-impresso. 

 Long. corp. 1 lin. 



Antenna3 moderately long, a good deal thickened 

 towards the extremity, blackish, the basal joint yellowish ; 

 3rd joint shorter and more slender than 2nd; 4th joint 

 small, 6 — 8 small and transverse, 9 — 11 distinctly broader 

 than the others. Palpi infuscate, the 3rd joint broad. 

 Head nearly as broad as the thorax, the eyes large, and 

 occvipying nearly all the side of the head; antennal tuber- 

 cles elongate and sharply elevated, the surface depressed on 

 the inside of each, so that the front of the head bears two 

 longitudinal impressions; the surface of the head very finely 

 punctured, dull. Thorax a good deal narrower than the 

 elytra, a good deal broader than long, much narrowed 

 towards the base ; the surface densely punctured, and near 



