250 Genus Ixodes 



Ixodes fecialis var. aegrifossus Warburton and 

 Nuttall, 1909. 



Fig. 246. 



Lit. and Icon. : Warburton and Nuttall, 1909, pp. 59, 60, Fig. 3 (reproduced). 



Male : unknown. 



Female (Fig. 246) : differs from the type in the following respects : 



Scutum narrower (1*4 x 1 mm.), more pointed posteriorly, with punc- 

 tations almost obsolete. Capitulum : base with the median triangular 

 region distinctly marked off by ridges from the lateral regions ; porose 

 areas hardly visible (aegrifossus) ; hypostome? 



Described from (N. 339) three mutilated ? s taken from an opossum, 

 Tamberine Mountain, Logan river, S.E. Queensland, IV. 1907, and 

 labelled " Scrub-ticks," sent by Professor R. T. Hewlett (London), who 

 received them from the Bacteriological Institute, Brisbane. We also 

 possess (N. 1213) a $ found on Perameles obesula, at Bannister, 

 W. Australia, 21. vm. 1900 (ex N. C. Rothschild coll.). 



N.B. The porose areas were at first believed to be absent, the median 

 area of the basis capituli appearing to be uniformly finely granular in 

 texture. They were distinctly though faintly apparent, however, in a 

 microscopic preparation. 



These ticks possess a type of scutum, broad posteriorly, which 

 appears to be somewhat characteristic of Australian forms. It is 

 observable in /. australiensis, I. ornithorhynchi and /. tasmani, and the 

 scutum of the nymph of /. vestitus is of this shape, though, in the adult 

 female, it tends to become more circular. /. tenuirostris alone of extra- 

 Australian species conforms to this type. The species here described 

 most clearly resembles /. vestitus in general characteristics. 



44. IXODES AUSTRALIENSIS Neumann, 1904. 



Figs. 247-249 (Figs. 247, 248, original). 

 Lit. and Icon. : Neumann, 1904, pp. 456, 457, Fig. 1 (reproduced). 



Male : unknown. 



Female : Body a short oval, usually broadest on a level with 

 coxae IV, more or less dark brown; L. 2 - 5 to 325 mm., W. 19 to 

 27 mm. Scutum hexagonal, with rounded angles, shorter than broad 



