152 



Genus Ixodes 



Fig. 146. I. ricinus o : capitulum in dorsal and ventral aspects, x 70. (Original, 



G. H.F.N, del.). 



Larva (PI. IV, Fig. 5, Text-figs. 147, 148): with the essential 

 characters of the O. 



See further under Notes on Biology (p. 294). Our description is 

 based upon the examination of a large material, collected in different 

 parts of the world. 



Geographical Distribution. 



Our collection contains specimens from the following places and 

 hosts [observations by other authors are added in brackets] : 



EUROPE : Scotland : From Blackaddie, Sanquhar, V. 1908 (N. 1 

 400, 401, 417), j/Vs $s, from dog, cattle and sheep (R. Bramwell) ; from 

 Shelfhill Farm, Hawick, v. 1908 (N. 405), /a, ?s, from sheep 

 (J. Murray) ; Mr W. F. Cooper's collection also contains $ s from sheep 

 at Hawick, IV. 1906 (C. Grieve); from Auchenbrack, Tynron (N. 423), 

 ?s, Os and larvae from sheep, V. 1908 (J. McMonnies) ; from Argyll- 

 shire (N. 1054), </" from sheep, v. 1910 (Captain Leschallus); from 

 Thornhill, Dumfriesshire (N. 415, 416), from cattle and lambs, v. 1908 

 (J. R. Wallace); from Coilessan (N. 933), ^s, ?s, from sheep, iv. 1905 

 (D. MacKenzie); from Inverness-shire (N. 355), from wild cat, iv. 1907. 

 In Dr J. H. Ashworth's collection, Edinburgh, we found specimens from 

 dog, Obney Farm, Baukfort, VIII. 1904; from deer, near Crawford, 

 X. 1908 ; from wild cat, no locality given ; and from host ?, Perth. 



1 Numbers following the letter N, refer to specimens as catalogued in our collection in 

 Cambridge. 



