212 RHYNCHOPHORA. 
the middle of the disc, and towards the outer margin; the under surface densely clothed with broad 
scales, those on the ventral surface almost entirely white. Rostrum stout, tapering at the tip, rugulose, 
bare at the apex. Prothorax transverse, rounded at the sides, narrowing from a little before the base to 
the apex, closely punctate. Elytra wider than the prothorax, separately rounded at the apex, the humeri 
rounded ; finely punctate-striate, the interstices flat and densely rugulose. Pygidium narrowly exposed.- 
Length 2, breadth 1,4, millim. 
Hab. Guatemata, San Gerénimo, Purula (Champion) ; Nicaracua, Chontales (Janson). 
The description is taken from four fresh specimens from San Gerénimo, the other 
three being in less perfect condition. Very like the following species, but a little 
broader, and with the coarser white scales scattered over the entire surface of the 
elytra (instead of being confined to the suture), the vestiture of the latter less distinctly 
arranged in lines, the strie narrower. 
9. Sibinia americana, sp. n. 
Subovate, black or piceous, the tip of the rostrum, the antenne, tibie, and tarsi, and sometimes the femora 
also, ferruginous ; thickly clothed with ochreous or greyish-ochreous piliform scales, the elytra with a 
dense line of oval, white, imbricate scales along the suture; the squamosity of the under surface dense 
and in great part white. Rostrum stout, tapering at the apex, rugulose, bare at the tip. Prothorax 
broader than long, moderately rounded at the sides, narrowing from a little before the base, parallel 
behind, densely punctate. LEytra wider than the prothorax, separately rounded at the apex, the humeri 
rounded; broadly punctate-striate, the interstices flat and rugulose, each with a treble imbricate series 
of piliform scales, the stris with a single row only. Pygidium narrowly exposed. Tibie# hooked at the 
inner apical angle in the ¢. 
Length 12-13, breadth 5%, millim, 
Hab. GuateMALA, San Gerdnimo, Aceituno, Guatemala city, Capetillo (Champion) ; 
Nicaracua,-Chontales (Belt); Costa Rica, San José (Liolley). 
Apparently not uncommon in Central America. The two specimens from Guatemala 
city have the vestiture of the upper surface whiter, and the legs entirely ferruginous. 
Very like S. melina, Faust, from Venezuela, but narrower, the prothorax less trans- 
verse, the suture of the elytra with a line of coarser white scales (of which there is no 
trace in 8. melina). The allied S. ochreosa, Casey, from Texas, has the clothing of the 
elytra denser and entirely ochreous. 
Group PRIONOMERINA. 
Prionomérides, Lacordaire, 
This group includes some of the most interesting forms of the American Curcu- 
lionine. 
The section Prionomerides is characterized by the extremely large, triangular, 
crenulated, acutely produced tooth on the anterior femora, this being absent in the 
Piazorrhinides. Both have a short, broad rostrum, contiguous anterior coxe, ungui- 
culate anterior, intermediate, and posterior tibiee, and appendiculate or toothed tarsal 
claws. In some of the species of Piazorrhinus the femora are unarmed. 
