660 . STAPHYLINIDA. 
longer than broad. Elytra very shining; irregularly, very coarsely, rather sparingly 
punctate. Hind body punctured only on the basal segment, the other segments very 
shining. Legs long; femora bright yellow on the basal half, the outer half nearly 
black; tibie testaceous, the apical half darker; tarsi fusco-testaceous. The male 
has an extremely short notch or emargination on the terminal ventral plate; the 
preceding plate deplanate on the middle, feebly pubescent, the hind margin slightly 
emarginate. 
Four examples. 
This insect is smaller than S. salvini and destitute of the thoracic tubercles. 
48. Stenus scutiger. | 
Gracilior, nigerrimus, nitidus ; antennarum basi palpisque sordide testaceis : tibiarum basi summo plus minusve 
anguste flavescente; parce irregulariterque punctatus; capite profundissime bisulcato. 
Long. 4? millim. 
Hab. Panama, David, Bugaba, Caldera, Volcan de Chiriqui 2000 to 3000 feet 
(Champion). 
Head with a large, elongate, wedge-shaped, polished elevation on the vertex. Thorax 
slender, rather longer than broad, a good deal rounded at the sides; very irregularly 
punctate, the punctuation being in some places rugose, while other spots are polished 
and free from sculpture. Elytra rather longer than the thorax, coarsely but sparingly 
and irregularly punctured. Basal segment of the hind body rugose, the other segments 
polished and shining. Male witha slight angular emargination of the last ventral 
segment. 
The small series of this insect shows some variation in sculpture and in the amount 
of yellow colour at the bases of the tibiz. Possibly there may be more than one 
species ; but the material leaves this quite uncertain. 
49. Stenus exulans. 
Gracilis, nigerrimus, nitidus; antennarum palpisque fusco-nigris, his articulo basali flavo; tibiis basibus 
testaceo-annulatis ; prothorace minus gracile, lateribus rotundatis, posterius angustato, irregulariter 
punctato, areis majoribus levigatis ; elytris parce irregulariterque punctatis ; capite profundissime bisulcato. 
Long. 5; millim. 
Hab. Guatemaua, San Gerénimo (Champion). 
The dark palpi, legs, and antenne render it impossible to confound this species with 
any of the allies except S. scutiger; and to that species S. exulans is closely allied, 
but is a more robust insect, with broader thorax and darker antenne and palpi; and 
the male has a moderately deep angular excision on the last ventral plate, and an 
emargination of the hind margin of that preceding it. Unique. 
