Genus Centrinus and tts Allies, 329 
anterior coxee approximate; mesosternum depressed ;_ first. 
abdominal suture distinct ; femora toothed ; claws united. 
Of the two genera described below, Enops is perhaps some- 
what doubtful as an ally of Centrinus. 
XENISUS. 
Rostrum longissimum, filiforme, arcuatum; scrobes laterales; an- 
tenne tenues, clava elongata, cylindrica; prothoracis basi vix 
bisinuata ; elytra triangularia; pectus ampliatum, haud canali- 
culatum ; mesosternum latum, elevatum, antice verticale; abdo- 
men segmentis duobus basalibus valde ampHatis, conjunctis ; 
coxee anticee separate ; femora mutica; unguiculi liberi. 
The cylindrical club differentiates Centrinus from Cylindro- 
cerus, from which it was at first separated by Schonherr as a 
subgenus; the character, however, is confined to the males, 
and is present in the genus before us, whose remarkably 
slender rostrum throughout is almost unique among the 
Curculionide. 
Xenisus curvirostris. 
X, subellipticus, glaber, niger, nitidus ; prothorace castaneo; elytris 
in medio flavyis; rostro corpore longiore, valde arcuato; antennis 
piceis, articulis 2°-7™ apice setosis. Long. 3} lin. 
Hab, Columbia. 
Subelliptic, smooth, glossy; prothorax chestnut-brown ; 
elytra flavous in the middle; rostrum longer than the body, 
the curve semicircular; scrobes lateral, beginning at one third 
from the base ; antenne black, slender; funicle elongate, the 
first joint as long as the club, the second to the seventh with 
setiform hairs at the apex ; prothorax transverse, constricted 
at the apex, the base slightly bisinuate, nearly impunctate ; 
scutellum subquadrate ; elytra subtriangular, as broad as the 
prothorax at the base, the shoulders generally rounded, striate- 
punctate, punctures oblong, approximate, interspaces very 
convex, a broad fulvous band across the middle, nearly ex- 
tending to the apex ; body beneath glossy black, metasternum 
at the sides covered with golden-yellow scales; legs glossy ; 
femora subclavate, mutic; tibie straight; tarsi with the third 
joint broadly bilobed ; claws free. 
ENOPs. 
Rostrum elongatum, basi vix incrassatum, arcuatum, apice paulo 
latius ; scrobes laterales; antennze tenues, clava ovata; pro- 
thorax transversus, ad latera in medio dilatatus, basi bisinuatus ; 
elytra late triangularia; pectus breve, profunde canaliculatum ; 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 23 
