256 RHYNCHOPHORA. | Orchestes. 
them and there undergo their transformations; they easily cut through 
the enclosing portion ‘of leaf and appear in large numbers in the perfect 
state on the outer side of the leaves of the trees. 
I. Posterior femora more or less dilated, often dentate 
on their underside; chest and side pieces pubescent ; 
size larger. 
i. Funiculus of antenne with six joints (Orchestes, 
Spe) 
16 Sides of elytra in front with a row of erect 
setee, independent of the general pubescence ; 
sides of thorax with outstanding setz. 
A. Scape of antenne comparatively long, inserted 
a little behind middle of rostrum. 
a, Thorax with a more or less distinct longi- 
tudinal central. furrow; colour red or 
brownish-red .. ; « o. «, O) OUERGHS i. 
b. Thorax without a central fur row, 
a*, Elytra red or yellowish-red with black 
spots; femora and tibie black . . . O. ALNT, L. 
b*. Elytra unicolorous red; femora and 
tibiz in part or entirely yellowish- -red . O. ALNI V, FERRUGINEUS, 
Marsh. 
c*, Elytra dark, closely covered with varie- 
gated grey, white, and blackish hair-like 
scales, and with a whitish patch at scu- 
tellumies, «1. E O. rIcIs, F. 
B. Scape of antenne shor ter, inserted between 
the base and the posterior third part of the 
rostrum ; thorax black. 
a. Elytra black with a clear white spotat base QO. tora, F. 
b. Elytra with raised black hairs which are 
visible if viewed sideways, variegated with 
very obscure bands of grey, and with a yel- 
lowish-white spot at scutelium; form longer ; 
antenneand tarsired . . . . « O. sparsus, Fahrs. 
ce. Elytra with the pubescence even, |, strongly 
variegated with white hair-like scales which 
cover nearly the whole basal portion; form 
shorter; antennae, tibiz and tarsi reddish- 
yellow. . . : . . O. AVELLANE, Don, 
2. Sides of elytra without a row of erect sete in 
front. 
A. Thorax with outstanding setz at sides; upper 
surface red, elytra with a spot at shoulders and 
a broad band in middle brown or black-brown (O. LONICER®, Herbst.) 
B. Thorax without outstanding sete at sides. 
a. Elytra not variegated. 
a*, Scape of antenne longer, inserted just 
behind the middle of the rostrum; body 
black covered with brown pubescence. . O. FAGI, Z. 
b*. Scape of antennze shorter, inserted to- 
wards base of rostrum. 
at. Body red or reddish covered with 
light silky yellowish pubescence ; an- 
terior coxe contiguous (Threcticus, 
Thoms.), 
