Mr. J. Walton on the genus Sitona. 233 
§ C. Eyes very prominent. 
10. Sitona tibialis, Herbst, Germ., Schonh. 
Curc. chloropus, Marsh. 
S. lineellus, Gyll., Schonh. 
— ambiguus (var. " Schonh. 
Curc. albescens, affinis et lineatulus, Kirb. MSS. 
Oblong, black ; clothed more or less thickly or unequally with 
shining silvery, coppery, or green scales, and with very short, 
suberect, inconspicuous sete. Head broad, rugulose-punctate ; 
the front with a broad and very deep furrow extending nearly to 
the apex of the rostrum: eyes large and very prominent : rostrum 
rather shorter than the head, and a little narrower, similarly 
punctured. Antenne entirely testaceous, or frequently with the 
joints of the funiculus piceous, and the clava fuscous. Thorax 
subquadrate, moderately dilated and rounded at the sides, convex 
above, transversely impressed near the apex, which is distinctly 
elevated, deeply rugose-punctate ; commonly more thickly co- 
vered on the lateral margins and down the middle with scales, 
distinctly or obsoletely trilineated. Elytra long-ovate, very con- 
vex above, profoundly punctate-sulcate, the interstices narrow 
and convex, indistinctly rugulose ; the suture, the fourth inter- 
stice (rarely the second), and the margin on each elytron more 
or less thickly clothed with pale scales ; either distinctly or indi- 
stinctly lineated, or often concolorous and scattered, and fre- 
quently more or less denuded. Body densely covered with sil- 
very-white scales beneath. Legs, with the femora generally black, 
sometimes the base and apex testaceous ; the tibie and tarsi also 
testaceous, the latter frequently piceous ; the legs rarely entirely 
black. Length 15—24 lines. 
British specimens of this insect were examined by Schénherr 
and Germar, and referred to Curc. tibialis of Herbst; tested by 
Schiippel. The following are small narrow varieties, viz. Cure. 
albescens of Kirby and Sit. ambiguus of Schonh. (of which I have 
foreign specimens), very thinly clothed with silvery-gray scales 
of one colour; Curc. affinis and Cure. lineatulus of Kirby, rather 
densely clothed. with silvery-gray scales; the latter variety with 
the alternate interstices of the elytra regularly lineated, and the 
legs black. 
Marsham appears to have confounded this insect with Cure. 
sulcifrons under the name of C. chloropus (see notes under S. sud- 
cifrons), and as from the insufficiency of his characters it appears 
doubtful to which it should be referred, and as it seems to have 
escaped the notice of Stephens, I necessarily describe it. 
Of Cure. lineellus 1 have carefully examined two foreign spe- 
cimens from Gyllenhal, four from the collection of Billberg, and 
Ann. & Mag. N. Hist. Vol. xvii. 
