THE BRITISH WOODLICE. 101
Cylisticus convexus De Geer. Plate XXI.
1778 Oniscus convexus De Geer (10), p. 553, pl. XXXV., fig. 11.
1833 Porcellio spinifrons Brandt (3), p. 177.
1836 Porcellio laevis Koch (34), part 6, pl. I.
1853 Porcellio armadilloides Lereboullet (39), p. 65. pl. I., fig. 18.
1853 Cylisticus laevis Schnitzler (65). p. 25.
1868 Porcellio armadilloides Bate and Westwood (1), p. 485.
1898 Cylisticus convexus Sars (59), p. 186, p. LXXXI.
There is but a single species of Cylisticus found in this
country, so that it is not necessary for us to go into much further
detail with regard to it. Cylisticus convexus has
the two joints of the flagellum about equal, and
they together in turn closely approximate in
length to the last joint of the peduncle. Mr.
Stebbing says, in a letter, that British examples
do not appear to have the "white tail-piece"
seen in Continental ones. It is not noticeable
in the preserved specimens which we have seen
from Berkhamsted and Leixlip, but it is very
evident in the living ones found at Hanwell and
Maidstone.
The abdominal appendages 1 to 5 are
provided with air-tubes.
BRITISH LOCALITIES :—
England: Maldon; (W.M.W. from R.M.):
Hanwell; Bluebell Hill, Maidstone; Eton;
(W.M.W.; : Berkhamsted; Portland; (Norman,
49).
Scotland: Salisbury Crags; Edinburgh; Lan-
arkshire; Rothesay; (Scott, 68): Killwinning; (John Smith fide
Robertson, 57): Highgate; (Bate and Westwood, 1).
Ireland: Leixlip, Co. Dublin; Tempo, Co. Fermanagh;
Goresbridge, Co. Kilkenny; (R.F.S.)
FOREIGN DISTRIBUTION :—
Europe: France; (25): Sweden; Norway; Denmark; Germany; Bohemia;
Holland; Belgium; Turkey; Caucasus; (59).
North America ; (59).