StaphylinidcR of the Amazon Valley. 131 



a little naiTower tlian the thorax ; the antenna? are dusky 

 yellow, and are rather shorter, joint 4 being about as long as 

 broad, joints 5 — 10 transverse; all the legs are black. 

 The 6th segment of the hind body slightly darker at the 

 extreme base ; the head and thorax rather more finely 

 punctured. 



St. Paulo; one spechnen, 2. 



Ohs. — A second female individual, labelled only Ama- 

 zons, departs still more from A", depressus, its head and 

 thorax being still more finely and spai'ingly punctured; 

 but I believe it to be only a variety of A", vigripes. 



8. Staphijllnus xantliopyfjus, Nord. 



I refer to this name a series of individuals, from Ega 

 and Pebas ; they appear to me to be quite conspecific Avith 

 other specimens from Mexico and central America, and I 

 have two or three other closely allied species from other 

 parts of South America. The characters of the male are 

 not described either by Xordmann or Erichson ; in that 

 sex the hind margin of the ventral plate of the 7th seg- 

 ment of the hind body has a broad but shallow notch in 

 the middle, and the front tarsi are slightly more dilated 

 than in the female. Erichson names the species Philon- 

 tlivs xanthopi/cjns, but his description does not accord very 

 satisfactorily with IS ordmann's, and I judge it to have been 

 drawn up from more than one species. In the Munich 

 Catalogue, Xordmann's species is recorded under the name 

 Xantliopygus abduminulis, and it is probable that the 

 appellation of the species will be again changed. 



9. Xanihopygus cognatus, n. sp. Subdepressus, nigei', 

 nitidus, abdomine segmentis duobus ultimis rvifo-testaceis. 

 Long. corp. 6 lin. 



Closely allied to Staphylmus xanthopyqus, Nord. 

 (^PhiluntlLus xantltopygus, Er. ), but not half the size 

 of that species. Antennae rather short and stout, not 

 thickened towards the extremity ; the first 3 joints black, 

 the rest fuscous ; 3rd joint almost shoiler than 2nd, 4th 

 and 5th slightly transverse, 6 — 10 evidently so; last joint 

 sinuate at the extremity and pointed. Head short, about 

 as broad as the thorax, coarsely and irregularly punctured, 

 the middle ]")arts without punctures. Thorax about as 

 long as broad, the sides scarcely sinuate behind and very 

 little rounded towards the front. Along the middle are 



K 2 



