Pogonocherus. | LONGICORNIA. 247 
P. bidentatus, Thoms. (léspidus, Laich. e¢ Brit. Cat.). Fuscous, 
variegated with white and lighter or darker brown pubescence ; antenna 
with ‘the base of the joints white; thorax with a tubercle on each side 
of disc and a spine on either margin ; elytra narrowed to apex, which is 
broad and bidentate, the tooth at sutural angle being short and blunt, 
and that at external angle long, sharp, and spinose ; scutellum clothed 
with white pubescence ; at the base of the elytra there is a conspicuous 
broad band of white pubescence, a little clouded at shoulder and in 
middle, extending from base over nearly half their surface ; between this 
and apex there are several black spots or fascicles of hair; legs dark, 
variegated with red, more or iess pubescent. L. 5-63 mm. 
In dead hedges, under bark of apple and pear trees, &c. ; local, but not uncommon 
in many districts; Darenth Wood, Lee, Faversham, Forest Hill, Croydon, Mickle- 
ham, Esher, Chatham, Whitstable ; Deal ; Hastings ; Portsmouth district ; Glanvilles 
Wootton; Devon; Swansea; Llangollen; Bewdley; Tewkesbury; Bromsgrove; 
Birmingham district; Repton; Cheshire; York; Scarborough; Liverpool ; North- 
umberland and Durham district ; Scotland, very rare, and perhaps not indigenous, 
Forth and Moray districts (Sharp) ; Ireland (Haliday). 
P. dentatus, Foure. (pilosus, F.; hispidus, Schrank.). Smaller 
than the two preceding species, fuscous brown, variegated with brownish- 
white pubescence, of which there is a large curved fascia near base, 
leaving the part around scutellum usually dark ; behind this there are 
several black fascicles of hair; the species may easily be known by 
having the sutural angle of elytra simple and the external angle pro- 
duced into a distinct spine; the elytra are narrower than in P. bidentatus, 
and the pubescence at base is much browner and less conspicuous; in 
the male the fifth ventral segment of the abdomen is truncate, and 
rather strongly impressed with a round fovea before apex ; in the female 
the fifth ventral segment is rounded at apex. LL. 4-55 mm. 
In hazel twigs, old ivy, crab trees, old hedges, &c.; not uncommon and generally 
distributed in the London district and the South; Swansea; Llangollen ; Coleshill ; 
Knowle; Trench Woods; Bircham Newton, Norfolk; Repton; Yorkshire; Bowdon, 
near Manchester; Northumberland and Durham district, near Gilsland, on oak 
hurdles, rare; Scotland, very rare, if indigenous, Solway district ; Ireland, near 
Dublin. 
Between the preceding genera and those that follow there intervenes 
the large and extensive genus Dorcadion, Dal., which contains upwards 
of two hundred species that occur exclusively in Northern and Central 
Asia and in Europe; there are no fewer than eighty-six found in the 
latter continent, and in point of numbers it is the most important of the 
European genera belonging to the Longicornia; the genus, however, is 
not represented in Britain, nor apparently in Scandinavia, although a 
fair number occur in Siberia and Russia; a single specimen of D. fuligi- 
nator was once found in the Tay district of Scotland, creeping over wet 
seaweed in St. Andrew’s Bay, but it was evidently an importation, and 
was probably introduced in ballast. They are rather stout and robust 
