242 RHYNCHOPHORA. 
apical half, the basal half coarsely punctate at the sides, the antenne inserted near the middle, the 
antennal club elongate, nearly as long as the funiculus. Prothorax conical, a little broader than long, 
strongly constricted in front, smooth. Elytra triangular, flattened on the disc and depressed along the 
suture ; the sutural and marginal striz sharply defined, the others faint or obsolete and their position 
indicated by rows of fine punctures, the interstices flat to near the apex. Beneath sparsely and very 
finely, the sides of the meso- and metasternum and of the abdomen coarsely and closely, punctate. 
Prosternum bifoveate in front and excavate down the middle before the anterior coxe, the latter 
distant. 
3. Prosternum in the fully-developed form armed with two short spines and with a deep circular cavity 
between them; first ventral segment flattened and somewhat closely punctate in the middle. 
Length 34-42, breadth 13-21 millim. (¢ 9.) 
Hab. Mextco, Toxpam (Sallé); GuatemaLa, Chacoj in Vera Paz (Champion) ; 
Nicaraeua, Chontales (Belt); Costa Rica, Cafias Gordas (Pittier); Panama, Bugaba, 
Volcan de Chiriqui (Champion). 
Numerous examples, one only of the males having the prosternum bispinose and 
with a deep median excavation. ‘The obliterated or faint dorsal striz (the sutural one 
excepted), the three pure white marks at the sides of the body beneath (in addition to 
the one at the base of the third elytral interstice), and the elongate antennal club, 
readily distinguish C. lissonotus. 
9. Cylindrocerus glabratus, sp.n. (Tab. XIII. figg. 30, 304, ¢.) 
$. Hlongate-rhomboidal, flattened above, shining, black; glabrous above and beneath, a small cluster of 
narrow white scales at the sides of the first ventral segment excepted. Head finely punctate; rostrum 
very long, moderately stout and rather coarsely punctate in its basal half, the apical half much smoother 
and more slender, the antenne inserted at about the middle, the antennal club nearly as long as joints 
2-7 of the funiculus united. Prothorax almost as long as broad, conical, sparsely, minutely punctate, 
except along a narrow space down the middle. Scutellum oblong-subquadrate. Elytra triangular, 
flattened and with two shallow transverse depressions on the disc; sharply striate, the striz feebly 
punctate, the interstices flat. Meso- and metasternum coarsely, the sides of the abdomen more finely, 
punctate, the rest of the under surface almost smooth. Prosternum armed with two long spines, and 
with a large, extremely deep, circular excavation between them, the two foves in front deep and 
coalescent. First ventral segment broadly depressed across the middle behind. Legs elongate ; anterior 
tibie strongly fusco-ciliate in their apical half within ; anterior tarsi with projecting fuscous hairs, 
Length 5%, breadth 25 millim. 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
One male. ‘This species is almost entirely glabrous, above and beneath, the legs 
are elongate, the prosternal cavity (¢) is very deep and large, and the spines are 
long, the prothorax is nearly as long as broad, &c. The anterior coxe are separated 
by about the width of one of them, The prosternal excavation jis deep enough to 
receive the antennal club. 
RHIANUS. 
Lhianus, Pascoe, Ann. & Mag. Nat. Hist. (6) iv. pp. 822, 323 (1889). 
Rostrum stout, arcuate; mandibles feebly notched on their inner edge ; eyes separated by the width of the 
rostrum; antennal club large, acuminate-ovate; prothorax tubulate in front ; scutellum large and 
