Orchestes. | RHYNCHOPHORA, 957 
at. Head, thorax and legs yellowish- 
metsl 2 17: OUSCURETLARTIS.. Fy: 
bf. Head, thorax and legs dark . . O. sCUTELLARIS, V. SEMI- 
RUFUS, Gyll. 
b}. Body black, covered with a uniform 
grey pubescence, anterior coxee separate 
(Hemirrhamphus, Bedel) . . . . O. PRATENSIs, Germ. 
b. Elytra variegated ; scape of antenne short, 
inserted towards base of thorax . . O. RuscI, Herbst. 
- Funiculus of antennz with seven joints (Tachy- 
erges, Schénh.). 
1. Elytra unicolorous black, without variegation ; 
antenne entirely black or pitchy blick. @ © O. STIGMA, Germ. 
2. Klytra black with transverse fasciz of whitish 
pubescence or hair-like scales; antennz red with 
at most the club dark. 
A. Tarsi testaceous; transverse fascias of elytra 
not distinct. . . - O. DECORATUS, Germ. 
B. Tarsi black or pitchy : ; transverse fascias of 
elytra very distinct, anterior one dentate, 
reddish or yellowish in middle. . . . O. saLiois, L. 
II. Posterior femora not appreciably dilated (Isochnus, 
Thoms.) ; funiculus of antennz with seven joints ; 
chest and side pieces clothed with white scales ; 
elytra black, unicolorous; size very small . . . O.SALICETI, Payk. 
The above characters will more or less easily distinguish the species ; 
the sete at the sides of the thorax, however, are very easily rubbed off, 
and one or two of the other characters are not always very distinct ; it 
may therefore be useful to add a table of the colour differences, which 
are very marked, as a rule, in this genus. 
Colour (at all events of elytra) uniform, without definite variegation ; 
O. quercus (red, brownish-red, or reddish-brown, with the abdomen, 
except base, unicolorous with body) ; O. alnd, var. ferrugineus (red, with 
head and abdomen black), and O. pee (red, with abdomen black) ; 
O. scutellaris, var. semirufus (red, with head, thorax, legs and abdomen 
black) ; O. fagi (brown) ; O. pratensis (grey) ; O. stigma (black, some- 
times with an obscure greyish patch at scutellum); O. saliceti (black). 
Colour red, with dark spots or bands on elytra; O. alni (head black) ; 
O. lonicere (head red). 
Colour black with a clear white spot at scutel'um, O, dota. 
Colour variegated ; O. dlicis, sparews, and decoratus (markings very 
scattered) ; O. avellane (elytra with the base entirely covered with a 
large common white patch and with a band behind middle) ; O. ruse 
(scutellum and two simple bands on elytra white) ; O. salicis (seutellum 
and two bands on elytra white, the one behind the middle simple, and 
the other before the middle dentate and including scutellary patch, and 
more or less red or yellowish-red in centre). 
O. quercus, L. Rufo-testaceous or reddish-brown, rather depressed, 
clothed with silky yellowish pubescence which is more or less irregular 
on elytra; eyes, breast and base of abdomen black, the former almost 
VOL. V. s 
