656 STAPHYLINIDA. 
37. Stenus micans. 
Nigerrimus, nitidus, brevissime albido-pubescens, fortius irregulariterque punctatus ; antennis, palpis pedibusque 
fusco-testaceis, antennarum, femorum, palporum tibiarumque basibus testaceis ; capite in medio angustius, 
minus argute, elevato et levigato. 
Long. 4 millim. 
Hab. Guatemata, Cubilguitz, San Gerodnimo, Duefias (Champion). 
Head small, only obscurely bisulcate, and with a narrow indefinite shining elevation 
on the middle. Thorax short and broad, only about as long as wide, rounded at the 
sides; coarsely but irregularly punctured, the sculpture being rugose, with here and 
there small indistinct smooth spaces. Elytra deeply, coarsely, and densely punctured, 
subrugose, shining. Hind body with the segments constricted and depressed at the 
base, rather feebly punctured and pubescent. Each tibia with a rather vague ring of 
lighter colour at its base. Male with a moderately large excision of the last ventral 
plate; the preceding segment slightly deplanate, pubescent, and projecting backwards 
in the middle. Six examples. 
A rather obscure species of the S. contractus and S. callosus group; the shining 
elevation on the middle of the head being much less developed than in the allied forms. 
38. Stenus inanis. 
Brevis, nigerrimus, nitidus, tenuissime albido-pubescens, fere grosse punctatus ; antennarum basi, palpis pedi- 
busque testaceis, femoribus apice summo palpisque extrorsum brunnescentibus ; capite parvo, vertice medio 
plaga elevata sat lata; prothorace rugoso, medio area angusta levigata; abdomine conico, obsoletius 
punctato. 
1 on: 
Long. 33 millim. 
Hab. Panama, David in Chiriqui (Champion). 
A distinct little insect somewhat resembling S. callosus, Er., but of shorter form, with 
smaller head and much coarser punctuation ; easily distinguished from S. micans by 
the pallid legs and the much smaller head. The thorax is small, much narrower than 
the elytra, much rounded at the sides, coarsely and rugosely punctured, shining, with 
a narrow impunctate space on the disc. Elytra convex, longer than the thorax, very 
coarsely punctate, very shining. Hind body conical; the basal segment rugosely 
punctate, the others nearly impunctate. 
One female. 
39. Stenus peregrinus. 
Nigerrimus, nitidus, tenuissime albido-pubescens, fere grosse punctatus; antennarum basi, palpis pedibusque 
testaceis ; capite haud lato, vertice medio parum argute levigato; prothorace fortius rugoso, medio area 
angusta levigata parum discreta. 
Long. 4 millim. 
Hab. Panama, David in Chiriqui (Champion). 
This insect has a rather broader head than S. znanis; the thorax is a little broader, 
