STENUS. 609 
45. Stenus asperatus. 
Nigerrimus, sat nitidus, densius, fortius profundissimeque punctatus, rugosus; antennarum basi, palpis, 
femorum tibiarumque dimidiis basalibus flavis, tarsis fusco-testaceis ; vertice medio plaga elongata, elevata, 
nitida ; prothorace medio area parva levigata, 
Long. 42 millim. 
Hab. Guatemaa, Cahabon 1000 feet (Champion). 
Readily distinguished from all the allied species, except S. Jaceratus, by the externally 
dense coarse punctuation of the thorax and elytra; from S. laceratus it differs by the 
basal half of each femur being bright yellow, and by the rather coarser punctuation. 
The male characters are slight, there being a shallow angular emargination of the 
last ventral segment, that preceding being a little deplanate along the middle and 
finely pubescent. 
46, Stenus salvini. (Tab. XVII. fig. 12.) 
Sat elongatus, nigerrimus, nitidus, inequaliter minus denseque punctatus; prothorace utrinque tuberculato ; 
palpis pallide flavis; antennis pedibusque testaceis, illis extrorsum, femorum apicibus tibiisque plus 
minusve late fuscescentibus ; abdominis apice longius bisetoso. 
Long. 5 millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet, Bugaba (Champion). 
Palpi elongate, clear yellow. Head rather broad, deeply bisulcate ; with a highly 
polished elongate elevation extending from the vertex to near the labrum, but narrower 
in front. Thorax longer than broad, with a small but distinct angular tubercle on the 
middle of each side, coarsely and irregularly punctate, with a smooth space along the 
middle. Elytra longer than the thorax, sparingly unequally punctate. Hind body 
subcylindric, polished and shining, with a few punctures on the basal segment. Male 
with an elongate, very definite, nearly parallel-sided excision of the last ventral 
segment; the penultimate segment broadly deplanate and finely pubescent, and the 
one preceding deplanate and pubescent on the hind margin. 
Nearly a dozen examples were procured of this elegant and distinct Stenus; the 
under surface is strongly pubescent (like many other Stent), in striking contrast to 
the polished and shining upper surface. 
47. Stenus remotus. 
Gracilior, nigerrimus, nitidissimus, parcius grosse punctatus ; palpis femorumque basibus flavis; antennis 
tibiisque testaceis, extrorsum fuscescentibus ; capite parum punctato, profundissime bisulcato ; prothorace 
disco area majore levigata. 
Long. 4 millim. 
Hab. Guatemata, Coatepeque, San Gerénimo, Panima in Vera Paz (Champion). 
Thorax rounded at the sides, without lateral tubercle, irregularly punctate, with a 
rather large impunctate space on the disc, rugose at the sides, rather slender, a little 
4 PP 2 
