Staphylinidai of tJie Ainazun Vulleij. 391 



the preceding- ones, 7 — 10 mtlier strongly transverse; lltli 

 joint as broad as the lOtli, obtusely pointed. Head much 

 narrower than the thorax, dull reddish ; punctuation very 

 indistinct, but with a Avell-niarked, fine, rather long, 

 yellowish pubescence ; eyes rather prominent. Thorax as 

 broad as the elytra, rather strongly transverse, very slightly 

 curved at the sides ; the front angles more depressed than 

 the hind ones, the base a little emarginate, so that the 

 hind angles project backwards ; the surface clothed with a 

 fine, dense pubescence, but with scarcely visible sculpture. 

 Elytra a good deal longer than the thorax, with similar 

 pubescence and obsolete sculpture. Hind body cylindric, 

 scarcely narrowed till the 7th segment, which is very 

 retractile. Legs reddish, the tibia with fine s])ines, which 

 are most distinct on the intermediate legs. 



Tapajos ; ten individuals. 



Ohs. — Notwithstanding the great difference in appear- 

 ance between this Sjiecies and the preceding (//. synthe- 

 ticns), they appear to be structurally closely allied. In 

 certain individuals of//, pubescens the ventral plate of the 

 7th segment of the hind body is somewhat prolonged and 

 acuminate in the middle ; judging from what is the case 

 in //. syntheiicus, I consider these to be females. 



4. Holotrochus suhtilis, n. sp. Ferrugineus, subtiliter 

 sat dense pubescens, subnitidus, obsolete punctatus ; pro- 

 thorace transverse, angulis posterioribus fere acutis. Long, 

 corp. \l lin. 



This species is extremely closely allied to //. pubescens, 

 but is readily enough distinguished, on comparison, by the 

 much shorter and more inconspicuous pubescence and the 

 less opaque surface ; it is also a little smaller, and has the 

 antennae a little shorter; in other respects it appears 

 scarcely to difiier from //. pubescens. 



Ega ; three individuals. 



5. Holotrochus clavipes, n. sp. Piceus, angustulus, sat 

 nitidus ; capite, thorace, elytrisque dense subtilissime lon- 

 gitudinaliter strigosulis, et parce subtiliter punctulatis ; 

 capite magno, mandibulis porrectis ; thorace basin versus 

 angustato, ad angulos posteriores foveolato ; pedibus sor- 

 dide testaceis. Long. corp. (abdomine extenso) 1^ lin. 



Antennae pitchy, stout, very short; 1st joint concealed 

 by the mode of insertion, joints 2 — 10 each shorter than 

 broad, 11 th joint obtusely pointed, rather lighter in colour. 



