444 PERCY SLADEN TRUST EXPEDITION 
and polished, the large shallow punctures on the prothorax each bearing a forwardly- 
directed, adpressed, setiform scale and the granules on the elytra each followed by a 
similar posteriorly-directed scale, the legs also with intermixed setiform scales. Head 
sparsely punctate beneath; eyes large ; rostrum curved, moderately stout, slightly 
widened towards the base, more strongly so in ?, somewhat flattened, in ¢ a little longer 
than the prothorax and sparsely, finely punctate, in $ almost smooth to near the base and 
with the apical portion much more elongate, the antenne in $ inserted at a little before, 
and in @ considerably behind, the middle; antennz sparsely setose. Eyes separated by 
less than the width of the narrowest portion of the rostrum. Prothorax transverse, 
gradually, arcuately narrowing from the base to the abrupt deep subapical constriction, 
the sides angulate anteriorly and posteriorly, forming an almost continuous outline with 
those of the elytra, the base deeply bisinuate ; the surface impressed with large shallow 
foveiform punctures, which are hidden by the vestiture. Elytra rounded at the sides and 
acuminate at the tip ; deeply punctate-striate, the interstices broad, convex, each bearing 
a scattered series of polished granular elevations. Beneath very coarsely, closely punctate, 
the first ventral segment unimpressed in both sexes. Femora hollowed towards the apex 
beneath, so as to appear feebly unidentate. Anterior tibize densely ciliate within in ¢. 
Length 6—10 mm. (¢9). 
Loc. Seychelles: Mahé, Silhouette, Praslin. 
One male and five females, apparently picked up singly, varying greatly in size and 
in the colour of the scales, which in one example are almost wholly brown and in another 
in great part white. In Mahé Mr Scott met with the insect near Morne Blanc and on the 
Cascade Estate, and in Silhouette he found one specimen on the marshy plateau of 
Mare aux Cochons; several of these were obtained by beating trees. My Gardiner had 
previously, in 1905, captured an example on Praslin. This species agrees very nearly with 
the description of Sphadasmus granocostatus, Fairm., from the Seychelles ; but as 
Fairmaire definitely states that the femora are unarmed and the prosternum is not 
eanaliculate, it is obviously not that insect. Kolbe’s specimen was found by A. Brauer 
in Mahé. 
RHETOGENES, n. gen. 
Rostrum arcuate, rather stout, subcylindrical, in repose reaching as far as the 
posterior margin of the middle coxe; rostral canal deep, squamose within, closed behind 
by the metasternum, which is hollowed beneath the angularly notched anterior margin ; 
prosternum very deeply emarginate in front; mesosternum depressed ; antennze inserted 
at or beyond the middle of the rostrum, slender, the club ovate; prothorax much 
narrower than the elytra; scutellum depressed; elytra broad, oblong; ventral segment 1 
much longer than the metasternum, 2 a little shorter, 3 and 4 very short, the first suture 
strongly sinuate; posterior coxee widely, the other coxee more narrowly, separated ; 
femora dentate or unarmed beneath; tibiee sinuate; third tarsal joint bilobed ; tarsal 
claws simple; body oblong, squamose. 
Type, R. sexcristatus. 
