G. H. F. Ntjttall 
411 
Larva (unfed): body 0'8 mm. long, resembles the $ and 0 in its 
chief characters (coxae, trochanters, tarsi). Scutum more rounded 
(0'4 X 04 mm.) than in the 0, with deep cervical grooves. Capitulum: 
hypostome 2 j 2, with six teeth in the external files. 
Described- from 1 $ (N. 961) found on rocks below a dove’s nest, 
Fastcastle, Scotland, 6. ix. 1909, by Dr J. H. Ashworth (Edinburgh)! 
1 0 and 3 larvae (N. 1142) found on young domestic pigeon, from a 
dovecot at Duniface, Stirlingshire, Scotland, 18. iv. 1910, and 1 $ and 
4 O’s (N. 1200) from the same source, 9. viii. 1910, communicated by 
Mr William Evans (Edinburgh). 
Ixodes loricatus var. spinosus n. var. 
Fig. 4. 
Male: unknown. 
Female : differs from the type as follows: 
It is larger and less hairy generally. The scutum (1'6 x 1'25 mm.) 
is broader and less punctate, there being about 20 rather coarse 
punctations situated in the median field. Capitulum broader (0'7 mm.) 
and relatively shorter, more massive, the ventral surface of the base 
Fig. 4. Ixodes loricatus var. spinosus $ : capitulum and scutum, ventral aspect of 
capitulum with coxae, vulva with commencing genital grooves; hypostome (highly 
magnified); spiracle, tarsus 4 and anal groove. G. H. P. N. del. 
Parasitology in 
27 
