Staphylinidoi of tlie A)nazon Vulle)/. 391 



the preceding" ones, 7 — 10 rather strongly transverse; 11th 

 joint as broad as the 10th, obtusely pointed. Head much 

 narrower than the thorax, dull reddish ; punctuation very 

 indistinct, but with a well-marked, 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 eniarginate, so that the 

 hind angles project backwards ; the sui^face clothed with a 

 fine, dense pubescence, but with scarcely visible sculpture. 

 Elytra a good deal longer than the thorax, wath similar 

 pubescence and obsolete sculpture. Hind body cylindric, 

 scarcely narrowed till the 7th segment, which is very 

 retractile. Legs reddish, the tibije with fine S])ines, Avhich 

 are most distinct on the intermediate legs. 



Tapajos ; ten individuals. 



Obs. — Notwithstanding the great difierence in appear- 

 ance between this species and the preceding (77. synthe- 

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

 certain individuals of U. 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 H. syntheticus, I consider these to be females. 



4. Holotroclius subtilis, n. sp. Ferruginens, subtiliter 

 sat dense pubescens, subnitidus, obsolete punctatus ; pro- 

 thorace transverso, angulis posterioribus fere acutis. Long. 

 0017). 1| lin. 



This species is extremely closely allied to H. 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 

 antennre a little shorter; in other respects it appears 

 scarcely to differ fi'om H. pubescens. 



Ega ; three individuals. 



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

 nitidus ; capite, thorace, elytrisque dense subtilissime lon- 

 gitudinaliter strigosulis, et parce subtiliter pimctulatis ; 

 capite magno, mandibidis porrectis ; thorace basin versus 

 angustato, ad angulos posteriores foveolato ; pedibus sor- 

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



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

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

 broad, 1 1 th joint obtusely pointed, rather lighter in colour. 



