276 STAPHYLINIDZA. 
coarse punctuation, which is not so dense and distinct on the basal segments as on the 
apical, its greatest development being on the sixth plate; the colour is ferruginous, but 
the dorsal plates are more or less vaguely marked with piceous in the middle of each. 
Legs yellow, tibic infuscate. 
Four specimens have been sent by Mr. Champion. 
4. Silusa subtilis. 
Ferruginea, parum nitida, subtiliter pubescens, antennarum basi et apice pedibusque testaceis ; elytris extror- 
sum magis obscuris, dense punctatis; abdomine obsolete punctato. 
Long. 23-34 millim. 
Hab. GUaTEMALA, Capetillo (Champion). 
Antenne rather short, a good deal thickened externally, the three basal joints yellow, 
the following very dark red, the extremity again yellowish; third joint about as long as 
the second; fourth small, scarcely so long as broad; fifth to tenth transverse; terminal 
joint large. Head narrow, only about half as broad as the elytra, quite obsoletely 
punctate. Thorax not very strongly transverse, narrowed towards the front ; hind angles 
moderately distinct, rather obtuse; the surface finely and closely punctate, scarcely 
transversely impressed in front of the base. Elytra longer than the thorax, densely 
punctate, not shining. Hind body with the second and third segments finely and 
rather closely punctate; on the following segments there is also a punctuation, but 
nearly confined to the basal portion of each, so that, unless extended, the segments 
appear almost impunctate. 
This species is readily distinguished from the others of the genus by the more densely 
punctate elytra; it has the mesosternal lamina even more largely developed than it is 
in S. hertella. Two of the three individuals agree closely, except that one of them is a 
male, while the third is much smaller and of paler colour, but is, I have no doubt, a 
poorly developed individual of the same species; the male has some obscure granules 
scattered on the dorsal plates of the sixth and seventh segments, and the hind margin 
of the latter is very obscurely crenulate. 
5. Silusa maura. 
Nigerrima, tarsis rufo-testaceis, antennarum articulo basali fusco, crebre, fortiter profundeque punctata, 
evidenter flavo-pubescens, sat; nitida. 
Long. 4 millim. 
Hab. GuatTEMALA, Capetillo (Champion). 
Antenne not elongate, rather slender, black, with the basal joint obscurely paler ; 
second and third joints subequal in length; eighth to tenth rather transverse. Head 
narrow, rather closely deeply punctate. Thorax strongly transverse, with a conspicuous 
coarse punctuation, and a depression at the base in the middle. Llytra not closely but 
distinctly punctate. Hind body not closely but rather coarsely punctate. 
