THE BRITISH WOODLICE, 



IO3 



it rolls up. It is interesting to compare this species with Cylisticus 

 convexus. The surface of the body is smooth, and its colour is a 

 delicate brownish grey with more or less distinct rows of darker 

 markings. 



BRITISH LOCALITIES : - 



England : Maldon ; (W.M.W. from R.M.) : Bluebell Hill, 

 Maidstone (W.M.W.); Clifton, banks of the Avon; (W.M.W. 

 from J.T.C. 1900) : Leigh Woods, Clifton ; Tunbridge Wells ; 

 South Devon; (Stebbing in 49); Cheddar Cliffs, Somerset; 

 .(Norman, 49). 



FOREIGN BIS TRIB U TIOX : — 

 Europe : Fiance ; (28) : Spain ; (12) : Italy ; (23). 



Armadillidium vulgare Latreille. Plate XXIII. 



1804 Armadillo vulgaris Latreille (37), p. 48. 

 Latreille (37). 



1804 Armadillo variegatui 



1853 Armadillo atcr Schnitzler (65), p." 48. 



1816 Armadillo maculalus Kisso (56). p. 158. 



1818 Armadillo pillularis Say (621, p. 432. 



1825 Armadillo bustulosub Dermarest (11), p. 323, pi. XLIX. 



1830-4 A rmadillidium commutatum Brandt and Ratzeburg (4), p. 81, 



XIII., hg, 123. 

 1833 Armadillidium zenckeri Brandt (3), p. 185. 

 1839 Armadillo trie talis Koch (34), part 28, pi. XIV. 

 1898 Armadillidium vulgare Sars (59), p. 189, pi, LXXXIL 



Pi. 



Armadillidium vulgare. Its 

 is broad, while its margin 



The common pill woodlouse is 

 frontal lobe is not large, though it 

 where it joins the head is rounded and slightly 

 recurved. The proximal joint of the flagellum 

 is somewhat the shorter and the two together, 

 as in Armadillidium nasatum, are of about the 

 same length as the last joint of the peduncle. 



The telson has the form of a triangle with 

 the angles truncated and is about as long as it 

 is broad at the base. The outer divisions of 

 the tail appendages are considerably broader 

 than they are long. 



The species can roll itself up into a very 

 perfect sphere, and when it assumes this form 

 its antennae are hidden beneath the much 

 expanded lateral plates of the first thoracic 

 segment. fig. 57.— flagellum 



r^ ... ... . , AND LAST PEDUNCULAR 



1 he body is smooth, shiny, and strongly jointofthk antenna 



, T . . . , , , of Armadillidium 



arched. Its colour varies very considerably, vulgare. 



generally it is ot a slaty-grey, but yellow mark- 

 ings are often present to a greater or less extent. In a specimen 

 before us (from Bluebell Hill, Maidstone) the head is of a 



