/. loricatus var. spinosus 



289 



Neumann (1901, p. 283) examined a gorged $ from Tierra del 

 Fuego (C. Berg coll., now in Neumann's coll., Toulouse). Our collection 

 contains specimens presented by Hon. N. C. Rothschild, as follows : 

 (N. 640) from Ateles melanochoerus, Tabasco de la Frontera, Mexico ; 

 (N. 641) from Didelphys aurita, Brazil, XL 1901 ; (N. 638) f, $, from 

 Didelphys sp., Sapucay ; W. F. Cooper's collection contains a </" from 

 Estancia Cooper, Paraguay, VI. 1906 (Foster). 



Ixodes loricatus var. spinosus Nuttall, 1910. 



Fig. 270. 

 Lit. and Icon.: Nuttall, xn. 1910, p. 411, Fig. 5 (reproduced). 



Male: unknown. 



Female : differs from the type as follows : 



It is larger and less hairy generally. The scutum (16 x 125 mm.) 

 is broader and less punctate, there being about 20 rather coarse 

 punctations situated chiefly in the posterior half of the median field. 

 Capitulum broader (0'7 mm.) and relatively shorter, more massive, the 

 ventral surface of the base showing a broad U-shaped depression 

 extending across the base posteriorly, the arms of the U reaching forward 

 toward the base of the palps. Venter : spiracles larger (0'55 mm. I.) 



Fig. 270. /. 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 grooves. (Nuttall, 1910, Fig. 5. G. H. F. N. del.) 



