100 THE BRITISH WOODLICE.
Atlantic Isles; (23).
America: North and South, almost everywhere, to judge from M. Dollfus'
list; (23).
Australia ; New Caledonia; (23).
Metoponorthus cingendus Kinahan. Plate XX.
1857 Porcellio cingendus Kinahan (32), p. 270. pl. XIX., figs. 1468-9,
1868 Porcellio cingendus Bate and Westwood (1), p. 489.
1885 Metoponorthus simplex Budde-Lund (8), p. 188.
The colour of Metoponorthus cingendus is steel blue with red
or yellowish spots. It has a raised line across
each thoracic segment and its abdomen is
narrower than in Metoponorthus pruinosus.
BRITISH LOCALITIES :—
England: Salcombe, Devon ; (Norman, 49):
South Devon ; (Stebbing in 49).
Ireland: Dublin; (B.M. from Kinahan);
Mountain Districts of Dublin, Wicklow, and
Cork; Coast of Kerry; Arran Islands; Achill,
Co. Mayo ; Roundstone, Co. Galway ; Mallow,
Caef Island; Glandore; Brock Haven, Co.
Cork ; Killoughrim Forest, Co. Wexford ;
Kenmare, Co. Kerry ; (R.F.S.).
FOREIGN D1STRIBUTI0N :—
Europe : France ; (25): Spain ; (12).
(2.) Able to roll up into a ball.
Genus—CYLISTICUS Schnitzler, 1853 (65), p. 24.
Flagellum, with two joints; abdomen broad; frontal lobe, very small.
The characters given immediately above are almost those of
Porcellio, with which Cylisticus might, perhaps, be confounded. The
latter has the power, however, of rolling itself into a ball, and the
first segment of the thorax is comparatively larger than in any
species of Porcellio, indeed the side plates of the segment in
question entirely flank the head. These features, as well as the
straight sides of the body and the arched back, connect Cylisticus
with Armadillidium, from which the former is, however, at once
separated by its long pointed tail appendages.