382 STAPHYLINIDA. 
This is one of a small group of species, of which S. ochropygus, Nordm., may be taken 
as the type, having a very peculiar condition of the mentum; they have also the left 
mandible more deeply excised between the base and the middle tooth than other 
species, so that it is there much more slender. 
I have three specimens of S. ignotus before me, two being from Mexico; all of them 
are in bad preservation. 
26. Staphylinus championi. (Tab. IX. fig. 20.) 
Latior, niger ; capite, thorace elytrisque eneis, illis densissime fortiter punctatis, fusco-pubescentibus ; abdomine 
parum conspicue bifariam nigro-variegato ; mento minore, eburnaceo. 
Long. 24 millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
Antenne rather slender, fuscous. Head broad, slightly narrowed in front, very 
densely punctate. Eyes occupying fully one half of the length of the sides. Thorax 
large, scarcely broader than long, straight at the sides, extremely densely punctured, 
without smooth line, except on a short and narrow space at the base. Elytra quite 
dull. Hind body black, and with two indistinct black marks on the middle of each 
segment, with scattered punctures visible among the pubescence. Under surface bearing 
a rather pallid fuscous pubescence. 
Three individuals have been found of this species. Although extremely similar to 
S. ignotus, it is a very distinct species, the mentum is only about half as broad, and the 
mandibles have not the peculiar form they have in that species. 
27. Staphylinus consors. 
Latus, niger; capite, thorace elytrisque eneis, illis densissime fortiter punctatis, opacis, fusco-pubescentibus ; 
abdomine medio parum discrete bifariam maculato, utrinque fusco-pubescente. 
Long. 22 millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
Antenne rather slender, fuscous red, with the base darker. Head rather large, with 
the eyes occupying fully one half the length of the sides. Thorax as long as broad, 
quite dull, very densely punctured, with traces only of a smooth line along the middle. 
Elytra as long as the thorax. Hind body black, with two indistinct black spots on the 
middle of each segment, at the sides with fuscous pubescence; with rather numerous 
coarser punctures visible among the pubescence. 
This species is very similar to S. championi, but has a smaller head and shorter 
mandibles, and the mentum is in the ordinary membranous condition. It is distin- 
guished from S. antiquus by the rather larger size, and by the eyes not occupying so 
great a proportion of the sides of the larger head, Only one ill-preserved individual 
has been found. 
