568 STAPHYLINIDA. 
densely punctured, dull, of a ferruginous colour. Legs short. The male has an 
extremely feeble emargination of the hind margin of the last ventral segment. 
One example from each locality. 
2. Ophiomedon longiceps. 
Subdepressus, sordide ferrugineus, capite prothoraceque nigricantibus, antennis pedibusque testaceis, densissime 
subtilissimeque punctatus, opacus ; capite elongato, oblongo, posterius emarginato ; prothorace subquadrato. 
Long. 4 millim. 
Hab. Panama, Bugaba (Champion). 
Antenne small, not thicker externally, the terminal joint short. Head elongate, the 
eyes small, very densely and finely punctate, the vertex rather deeply emarginate. Thorax 
rather small, as long as broad, a little narrowed behind, the punctuation extremely 
minute. Elytra very finely punctate, ferruginous yellow, infuscate about the suture. 
Three examples. I do not detect any sexual character. 
3. Ophiomedon subtilis. 
Subdepressus, fuscus, antennis pedibusque sordide testaceis; capite orbiculato-quadrato, densius subtiliusque 
punctato ; prothorace subquadrato, omnino subtilissime densissime vix perspicue punctato. 
Long. 4¢ millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
We have received only one example, in very bad preservation, of this species, which, 
however, is clearly distinct, and can be certainly distinguished from O. longiceps by the 
shape of the head and thorax; the former is much curved at the sides near the hind 
angles, and the vertex is less emarginate; while the latter is scarcely at all narrowed 
behind. The punctuation of the head is fine and very dense, but quite distinct, while 
that on the thorax can scarcely be distinguished; the thorax has an excessively fine, 
short channel behind the middle; the terminal joint of the tarsus is longer than in 
the allied species. ‘The unique individual has a broad, but very slight, emargination of 
the last ventral segment, and is probably a male. 
4, Ophiomedon longulus. 
Elongatus, angustulus, subdepressus, ferrugineus, capite prothoraceque nigricantibus; capite subquadrato, 
omnino densissime minus subtiliter punctato, opaco; prothorace subelongato, densissime minus sub- 
tiliter punctato, tenuiter canaliculato; elytris dense punctatis, minus opacis. 
Long. 5 millim. 
Hab. Panama, Bugaba 800 to 1500 feet (Champion). 
Antenne rather long, not thickened externally, each joint longer than broad. Head 
not emarginate behind, its punctuation excessively dense, moderately fine. Thorax as 
long as broad, very slightly curvate at the sides, the front angles indistinct, the surface 
very densely, moderately finely punctate, with a fine channel along the middle nearly 
