Orchesfa.] BHYXCHOPHORA. 



. Head, thorax and legs yellowisli- 



red ".".... O. SCUTKI.I.AKIS, F. 



bj. Head, thorax and legs dark . . O. BCCTELLAKI.*, T. SESCI- 



BUFUS, Gyll. 



bf. Body black, covered with a uniform 

 grey pubescence, anterior coxae separate 



(Hemirrhamphug, Bedel) O. PBATEXSis, Germ, 



b. Elytra variegated ; scape of antennae short, 



inserted towards base of thorax . . . . O. Bcscr, Herbst. 

 ii. Fnniculu-s of antennae with seven joints (Tachy- 

 erges, Schoub.). 



1, Elytra nnicolorous black, without variegation; 



antennae entirely black or pitchy black. . . . O. STIGMA, Germ. 



2. Elytra black with transverse fascia? of whitish 

 pubescence or hair-like scales; antenna? red with 



at most the club dark. 

 A. Tarsi testaceous ; transverse fascia of elytra 



not distinct O. DECOBATCS, Germ, 



R Tar.-i black or pitchy ; transverse fasciae of 

 elytra very distinct, anterior one dentate, 



reddish or yellowish in middle O. 8AUCIS, L. 



II. Posterior femora not appreciably dilated (Isochuus, 

 Thorns,) ; funiculus of antennae with seven joints ; 

 chest and side pieces clothed with white scales ; 

 elytra black, nuicolorous ; size very small . . . O. SAI.ICETI, Payt. 



The above characters will more or less easily distinguish the species ; 

 the setae 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 ad.l 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, nnicolorous witli body) ; O. alni, var. ferrugineus (red, with 

 head and abdomen black), and 0. scutellaris (red, with abdomen black) ; 

 O. scutellarit, var. &miruj'ie.* (red, with head, thorax, legs and abdomen, 

 black) ; O. Jagi (brown) ; O. pfaten^is (grey) ; O. stigma (black, some- 

 times with an obscure greyish patch at scutellum) ; O. scilicet i (black). 



Colour red, with dark spots or bands on elytra ; O. alni (head black) ; 

 O. lonicerce (head red). 



Colour black with a clear white spot at pcutellum, O, iota. 



Colour variegated ; O. ili>:is. fparfu*, and decoratug (markings very 

 scattered) ; O. avellaitee (elytra with the base entirely covered with a 

 large common white patch and with a band behind middle) ; O. ru*-i 

 (scutellum and two simple bands on elytra white) ; O. salicis (scutellum 

 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. 8 



