120 RHYNCHOPHORA. {| Byctiscus, 
structed for them: in some cases several leaves are joined together with 
the same object; the method adopted by the insect appears to depend 
on the size of the leaves; our two species (which are the only two that 
occur in Europe *) are very conspicuous and handsome insects; they 
may be distinguished as follows:— 
I. Elytra with scanty whitish pubescence at apex; upper 
and under surface of the same colour (green, golden-green, 
bluish-green or violet), or if different, with the underside 
green; forehead simply impressed . . . . . . . © . B. Berutet, F. 
(aint, Mull.) 
II. Elytra entirely glabrous; upper surface green or golden- 
green, under surface dark blue ; forehead witha deep broad 
chainel lovik 2 ade ete ee Bare coe ellis wey oral Geer DP eOkgni ga 
B. betuleti, F. (betule, L., + alni, Mill.). Upper surface golden- 
green or deep blue; in the former case the under side is golden-green 
and in the latter either green or unicolorous with the upper side; legs 
coppery, or golden-green, or deep blue ; head and rostrum rather strongly 
sculptured, forehead simply impressed ; thorax very convex, distinctly, 
regularly, and moderately thickly punctured, with a longitudinal central 
channel ; scutellum moderate ; elytra sericeous, finely pubescent behind, 
with not very regular rows of punctures and the interstices thickly and 
finely punctured ; legs moderately long. L. 47-7 mm. 
Male with a long projecting spine on each side of the front of thorax. 
In woods on young birch and hazel ; very local, but not uncommon where it occurs ; 
Darenth Wood (Power from 1858—1875, Champion, &c.); Westerham, Kent; 
Hastings; Portsmouth district; Southampton; Glanvilles Wotton (very rare) ; 
Swansea; Bretby Wood, Repton ; Baron Wood, Cumberland, and Scotland (Stephens) ; 
it is not, however, recorded by either Bold or Sharp in the Northumberland and 
Durham and Scotch Lists. 
B. populi, L. Entirely glabrous, upper side bright golden-green or 
coppery, under side, legs, and rostrum violet-blue, antenne black ; it is 
very closely allied to the preceding, but is smaller, and may be known 
by the colour of the under surface, and also by having the forehead 
furnished with a broad deep channel; the elytra, moreover, have no 
pubescence behind, and the funiculus of the antenne is evidently 
longer ; in the male the thorax is spined as in the preceding species. 
L. 4-5 mm. 
On young aspens; very local, but not uncommon where it occurs; London dis- 
trict, not uncommon, Putney, Darenth and Lee Woods, Blenden (Kent), Coombe 
Wood, Epping Forest ; Hastings district; Fordlands, Devon. 
ee — ——— eS pn Ln LLL, Lee ae 
* Thomson formed the genus for the reception of these species, but Dr. Sharp has 
lately recorded five from Japan, and says that he is acquainted with others from China, 
the Indo-Chinese Peninsula and East india, 
+ This name ought to be adopted were it not for the confusion caused between this 
insect (Cureulio betula, L.), and Deporaus betule, which is the Attelubus betule of 
Linné. 
