123 
straight; the posterior angles rounded, and the posterior margin in- 
distinctly produced in the middle ; the surface very thickly punctured 
and covered with pale brownish scales, and having interspersed mi- 
nute hairs ; in parts the scales assume a deeper hue, and in the middle 
is a whitish line. Elytra about one-third broader than the thorax, 
convex, and of a short ovate form ; punctate-striated ; the interstices 
obscurely punctured, and slightly convex; they are covered with 
brownish scales, and have interspersed minute pale hairs; rather 
behind the middle is a broadish curved mark, which is obliterated on 
the sides of the elytra; and towards the apex is a small angular tu- 
bercle. 
From the collection of Mr. Darwin. 
Listroperes apicauis. Listr. squamosus, fusco-albescens ; an- 
tennis piceis ; rostro carind longitudinali fuscd ; capite notis dua- 
bus fuscis antic? convergentibus ; thorace antic? quam posticé la- 
_tiore, ad latera fer? recto, antice foved incurvatd, lined albd lon- 
gitudinali ; elytris thorace duplo latioribus, punctato-striatis ; sin- 
gulis notd nigrescente obliqud, ad apicem albescente, tuberculo di- 
stincto subapicali. 
Long. corp. et rostri, 3; lat. 13 lin. 
Hab. Monte Video. 
This species is considerably less than the L. costirostris, being about 
equal in size to the Phytonomus rumicis. The rostrum is rather slen- 
der, nearly twice as long as the head, covered with minute decum- 
bent hairs, which are of a whitish brown colour; in the middle is a 
longitudinal carma. The thorax is broader than long; the broadest 
part is considerably in front of the middle ; in front it becomes some- 
what suddenly contracted ; the sides of the thorax converge from near 
the anterior part towards the base, and are nearly parallel; the pos- 
terior margin is slightly rounded, being produced in the middle ; the 
hinder angles are obtuse; the upper surface of the thorax is nearly 
plane, presenting scarcely any convexity, and in the fore-part is a 
curved impression, the extremities of which lead up to the anterior 
angles; it is densely clothed with scales, and these are of a very 
pale brownish colour; in parts the scales are of a deep brown co- 
lour, and in the middle is a longitudinal line, formed of whitish 
scales; besides the scales are some very minute, semierect, scattered 
dusky hairs; the sculpturing cannot well be seen, owing to the cover - 
ing of scales, but the thorax appears to be very thickly though not 
coarsely punctured. The elytra are oblong, about one-third broader 
than the thorax; the humeral angles are prominent and rounded; 
the sides nearly straight, and the apex rounded; the surface is con- 
vex, but somewhat depressed at the basal portion of the elytra ; punc- 
tate-striated; covered with pale brownish scales, having moreover 
some very minute scattered spines; the third and fifth interstices of 
the strize on each elytron are slightly raised ; rather behind the middle 
is an oblique deep brown patch, behind which the scales are white, 
or nearly so ; a distinct angular tubercle is observable on each elytron, 
at a short distance from the apex. The legs and antennz are brown, 
