G. H. F. Nuttall 
251 
referred to as having been described in 1909. A normal ^ is illustrated 
in Parasitology, vi. 200, Fig. 3 a. 
Fig. 1. Rhipicephulus appendiculatus (J. Monstrosity. 
Specimen 2. 
(Fig. 2.) Ixodes caledonicus Nuttall, 1910, $ (N. 1542), captured, 
together with other specimens, in a dovecote at Dunipace, Stirlingshire, 
Scotland, 25. v. 1911, by Mr W. Evans, of Edinburgh. This specimen, 
which had fed on pigeons, is abnormal in respect to the anal grooves 
Fig. 2. Ixodes caledonicus $. Abnormal anal grooves. The left posterior portion of 
the body is underdeveloped. 
which form a closed circle around the anus as in normal Ixodes rasus 
Neumann, 1899. The left side of the body is somewhat under¬ 
developed. In normal specimens of I. caledonicus ? the anal grooves 
run backward in an almost parallel manner and are not joined posteriorly. 
17—2 
