194 SERRICOENIA. [Ftilinus. 



PTI LINUS, 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 antennae 

 of the male, and its long cylindrical shape, as well as by the fact 

 that there are no distinct striae on the elytra. 



P. pectinicornis, L. (impreasifrons, 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; 

 antenna 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 striae, with obsolete traces of raised lines ; legs moderate, with 

 the tarsi nearly as long as the tibiae, first joint elongate. L. 3-5 mm. 



Male with the antennae strongly fla.bellate, and with a dull raised 

 tubercle on each side of thorax. 



Female with the antennae 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 Bentonj Scotland, very rare, in old trees, Solway and 

 Forth district ; Ireland, near Dublin. 



O CHIN A, Stephens. 



This genus contains two European species, one of which is found in 

 Britain ; it may be known by its faintly serrate antennae, of which the 

 last joints are not, or scarcely, broader than the preceding, and by the 

 absence of elytral striae. 



O. hederae, Mull, (piinoides, Marsh.; Cittobium hederce, Muls.). 

 Oblong oval, convex, elytra somewhat depressed on disc, of a dark 

 reddish-brown colour, clothed with close greyish pubescence, with the 

 disc of thorax, and the base and apex and a fascia behind middle of 

 elytra without pubescence, which gives the "insect a variegated ap- 

 pearance; antennae 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 indistinct traces of raised 

 lines; legs moderately robust, first joint of tarsi elongate. L. 2^-3 mm. 



