THE BRITISH WOODLICE. 



IOI 



Cylisticus convexus De Geer. Plate XXI. 



1778 Oniscui* convexus De Geer (10), p. 553, pi. XXXV., fig. 11. 



1833 PorceUio spinijrons Brandt (3), p. 177. 



1836 PorceUio laevis Koch (34), part 6. pi. I. 



1853 PorceUio armadilloides Lereboullet (39), p. 65. pi. I., fig. 18. 



1853 Cylisticus laevis Schnitzler (65). p. 25. 



1868 PorceUio armadilloides Bate and Westvvood (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 i to 5 are 

 provided with air-tubes. 



BRITISH LOG A LITIES : - 



England: Maldon ; (W.M.W. from R.M.) : 

 Hanwell; Bluebell Hill, Maidstone; Eton; 

 (W. M.W.J : Berkhamsted ; Portland ; (Norman, 



49)- 



Scotland : Salisbury Crags ; Edinburgh ; Lan- 

 arkshire ; Rothesay; (Scott, 68): Killwinning; (John Smithy 

 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). 



FIG. 55. — FLAGELLUM 

 AND LAST PEDUNCULAR 

 JOINT OF THE ANTENNA 



of Cylisticus convexu*. 



