194 SERRICORNIA. [ Ptilinus. 
PTILINUS, Geoffroy. 
This genus contains thirteen or fourteen species, of which five are 
found in Europe ; the remainder have been described from the Atlantic 
Islands, Senegal, Ceylon, and North America; one species only occurs in 
Britain ; it may easily be known by the very peculiar flabellate antennze 
of the male, and its long cylindrical shape, as well as by the fact 
that there are no distinct striz on the elytra. 
P. pectinicornis, L. (impressifrons, Kiist.). Elongate, cylindrical, 
parallel-sided; colour variable, either entirely fuscous-black, or fuscous 
with the elytra brown or reddish-brown, or reddish with the apex fuscous; 
antenne and legs ferruginous, the processes of the joints of the former 
being sometimes fuscous at apex; head sunk in thorax, eyes rather large, 
convex; thorax subquadrate, with sides rounded, granulose, the granu- 
lations being more distinct in front, with a raised smooth line at base 
before scutellum; elytra elongate, with fine rows of punctures, but 
without strie, with obsolete traces of raised lines ; legs moderate, with 
the tarsi nearly as long as the tibia, first joint elongate. L. 3-5 mm. 
Male with the antenne strongly flabellate, and with a dull raised 
tubercle on each side of thorax. 
Female with the antenne shorter, pectinate, and with a shining raised 
tubercle on each side of thorax. 
In old posts; also in old willow, oak, fir, whitethorn, hornbeam, &c.; not uncom- 
mon and generally distributed throughout the greater part of England and Wales; 
rarer in the extreme north; Northumberland and Durham district, Durham, Sunder- 
land, Ravensworth, and Long Benton; Scotland, very rare, in old trees, Solway and 
Forth district ; Ireland, near Dublin. 
OCHINA, Stephens. 
This genus contains two European species, one of which is found in 
Britain ; it may be known by its faintly serrate antennew, of which the 
last joints are not, or scarcely, broader than the preceding, and by the 
absence of elytral striz. 
O. hederz, Miill. (ptinoides, Marsh.; Cittobium hedere, Muls.). 
Oblong oval, convex, elytra somewhat depressed on disc, of a dark 
reddish-brown colour, clothed with close greyish pubescence, with the 
dise of thorax, and the base and apex and a fascia behind middle of 
elytra without pubescence, which gives the insect a variegated ap- 
pearance; antenne and legs reddish-testaceous; head not deeply sunk 
in thorax; thorax broader than long, narrowed in front, even, with 
distinct side margins, under-side without depression for the reception of 
the head; scutellum rounded triangular; elytra rather broad, closely, 
finely and irregularly punctured, with very indistinet traces of raised 
lines; legs moderately robust, first joint of tarsi elongate. L. 23-3 mm. 
