122 
and in some specimens are some whitish spots arranged in lines on 
the apical portion of the elytra. 
From the collection of Mr. Bridges. 
LisrropERES PILosus. Listr. niger, opacus, setosus, fusco-squa- 
mosus ; antennis tarsisque fuscescentibus ; rostro indistinctissime 
carinato ; thorace crebré punctato, subquadrato, lateribus subro- 
tundatis ; elytris punctato-striatis. Capite, thorace, elytrisque 
squamis fuscis atque nigrescentibus dense tectis. * 
Long. corp. et rostri, 34 lin. ; lat. 1} lin. 
Hab. Valleys of Petorca. 
About equal in size to Sitona fusca. Rostrum a trifle longer than 
the head, slightly rugose, and with a very indistinct longitudinal 
carina. Head thickly punctured, the punctures confluent, and an 
impressed line between the eyes. Thorax subquadrate, and some- 
what depressed ; very thickly, but not coarsely punctured, the punc- 
tures confluent ; the width greater than the length; the sides nearly 
straight and parallel, excepting near the base and apex of the thorax, 
where the width is gradually contracted. Elytra but little wider 
than the thorax, somewhat convex and elongated ; the humeral angles 
rounded, and the apical portion rather attenuated, but with the tip 
rounded ; the sides subparallel ; punctate-striated ; the punctures, of 
moderate size, are rather close together ; the interstices of the strize 
nearly flat, and apparently slightly rugose. 
The sculpturing of the rostrum, head, thorax and elytra is with 
difficulty examined, all these parts being densely clothed with scales ; 
these are chiefly of a brown colour, but in parts they are of a blackish 
hue. On the thorax is an indistinct dusky line in the middle, and 
one or two dusky patches at the sides ; the elytra are variegated with 
deep and pale brown. 
From the collection of Mr. Bridges. 
Listroderes costirostris, Scho. Several specimens of this species 
are contained in Mr. Darwin’s collection, having been collected at 
Maldonado; and there are, moreover, specimens collected at Co- 
quimbo which present no distinguishing character, excepting in being 
of a larger size, viz. total length 54 lines, width 2} lin. ; those from 
Maldonado being 43 lines in length and 12 in width. 
ListRoDERES roBustus. Listr. breviter ovatus, niger, opacus, 
Susco-squamosus, setosus ; antennis fuscescentibus ; rostro longi- 
usculo, carinato, pilis minutis decumbentibus tecto ; thorace crebreé 
punctulato, brevi, vittd albd ornato, lateribus subrotundatis ; elytris 
breviter ovatis, punctato-striatis, fascid albescente, ad latera inter- 
ruptd, ornatis, singulaitm tuberculo subapicali instructis. 
Long. corp. et rostri, 43 lin. ; lat. 23 lin. 
Hab. Coquimbo. 
In size and form this species may be compared to the Phytonomus 
punctatus. Rostrum about twice as long as the head, covered with 
minute decumbent brownish hairs, and with a longitudinal carina. 
Thorax rather broader than long, very suddenly contracted in front, 
and broadest near the fore-part ; the sides slightly rounded, or nearly 
