38 THE BRITISH WOODLICE. 
Atlantic [sles ; (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. 279, pI. 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). 
Iveland: 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.). 
FIG. 54.— FLAGELLUM 
AND LAST PEDUNCULAR 
JOINT OF THE ANTENNA FOREIGN DISTRIBUTION :— 
or Metoponorthus 
cingendus. Europe : France ; (25): Spain; (12). 
(2.) Able to roll up into a ball. 
Genus—CYLISTICUS Schnitzler, 1853 (65), p. 24. 
Flagellum, with two ioints ; 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 Avmadillidium, from which the former is, however, at once 
separated by its long pointed tail appendages. 
