/. angustus 



195 



20. IXODES ANGUSTUS Neumann, 1899. 



Figs. 187-190 (original). 



Lit. etc. : Ixodes angustus Neumann, 1899, p. 136 (no figure). 



not Ixodes angustus Neumann, 1901, p. 284, Fig. 4 (digit of ? ). In this paper 

 Neumann re-described what he took to be angustus from 2 $ s found on 

 Didelpkys azarai, Buenos Ayres (C. Berg coll.). Banks (1908, v. infra) has 

 pointed out that this second description relates to an entirely different form 

 which Neumann (1910, p. 30) has since recognized as /. loricatus. In con- 

 sequence of this mistake Neumann (1910) suppresses the species angustus, 

 but this does not appear to us to be permissible, for the type specimen first 

 described (1899) still exists, and is a perfectly distinct species. 



Ixodes angustus Neumann, in Banks, 1904, p. 331 ; 1908, p. 29, PI. IV, Fig. 2 

 ( 9 capitulum, scutum, coxae and spiracle ; sketchy, but not very inaccurate). 



Male 1 (Fig. 187) : oval, rather narrower in front, broadest in the 

 middle. Scutum (l - 4 x '9 mm.) convex, marginal fold moderate; 

 numerous fine, shallow punctations and short white hairs; a rather 

 well-defined pseudo-scutum ; cervical grooves shallow, divergent ; lateral 

 grooves indicated by slight marginal ridges 'on the pseudo-scutum. 

 Venter : genital orifice opposite the second intercoxal space ; pregenital 

 plate of irregular form, short; median plate sub-trapezoid, longer 

 than broad, narrower in front ; anal plate with sides very slightly 

 diverging; adanal plates rhomboidal. Spiracle sub-circular, its ventral 

 border somewhat pointed. Capitulum : base trapezoid, broader in 



Fig. 187. J. angustus i : dorsum, venter, spiracle and tarsus 4. From specimen 

 (N. 1065) found on squirrel, Mt Lehman, British Columbia, S. Hadwen coll. 

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



1 Banks, 1908, p. 30, appears to have seen the male ; his description covers five lines 

 and is quite inadequate. The o and larva have not been hitherto figured or described. 



