CHAMPION—COLEOPTERA ; CURCULIONIDA 447 
RHOMBOSOMA, n. gen. 
Rostrum arcuate, widened at the base, moderately long, the antennze inserted at 
about the middle; eyes very large, lateral, coarsely facetted; rostral canal very deep, 
closed by the prominent, horizontal, U-shaped mesosternal process; metasternum short, 
the episterna broad, angularly dilated anteriorly; ventral segment 2 nearly as long as 
3 and 4 united, the sutures shallow, the first arcuate; prothorax cucullate in front, 
subtriangular ; scutellum small, prominent ; elytra subtriangular ; femora linear, hollowed 
towards the apex; tibize rounded at the outer apical angle; third tarsal joint broadly 
bilobed, the claws free; body rhomboidal, convex, laterally compressed, squamose, 
winged. 
Type, R. acuminatum. 
The type of this genus approaches the American Pseudomus and Pseudomopsis, 
differing from them in having broadly exposed metathoracic episterna, the wings fully 
developed, &c. It has nothing to do with the somewhat similarly shaped Lobotrachelus 
from 8. Africa, &e., which have approximate exposed eyes, these insects being nearly 
related to the Zygopina. &. acwminatwm may be an introduced American form in 
Silhouette ? 
65. Rhombosoma acuminatum, n. sp. 
Moderately elongate, piceous, the antenne and tips of the tarsi ferruginous ; 
variegated with a rather dense clothing of brown, fuscous, and (a few) white scales, the 
pale brown scales on the elytra condensed into an oblique fascia on the disc before the 
middle and the white scales into a small spot on the second interstice towards the apex, 
the surface also set with a few short, curled, adpressed setze, the legs annulate. Head 
densely punctate above, sparsely so beneath; rostrum closely punctate and squamose at 
the base, bare, shining, and much smoother in its apical half. Prothorax broader than 
- long, obliquely narrowed forwards, slightly constricted near the apex, bisinuate at the base; 
closely punctate, much smoother and alutaceous on the middle of the disc. Elytra a little 
wider than the prothorax, rapidly, obliquely narrowing from a little below the base, the 
humeri rounded; deeply punctate-striate, the interstices rather convex and minutely 
punctate. Beneath coarsely punctured, the punctures on the ventral segments 3 and 4 
reduced to a single transverse row. Legs rather long and stout, the anterior femora only 
with a minute tooth. 
Length 44 mm. (@ 2). 
Loc. Seychelles: Silhouette. 
One specimen, found near Mont Pot-a-eau, at about 1000 feet, VIII. 1908. It has 
the scales on the prothorax somewhat abraded, the dise thus appearing to have a large 
triangular dark patch. 
ScYTHA, n. gen. 
Rostrum cylindrical, feebly curved, deflexed, received in repose between the anterior 
and middle coxee, the antennz inserted near the middle, jomts 2—7 of the funiculus short, 
widening outwards, the club large and nearly as long as the funiculus; rostral canal 
