l>i;l> 



Genus Ixodes 



in the posterior portion of the lateral fields, the rest of the scutum finely 

 punctate and sometimes rather rugose ; cervical grooves very distinct 

 for half the scutal length ; no lateral grooves. Venter : vulva just 

 behind coxae II; genital grooves sub-parallel; anal grooves rounded 

 in front of the anus, the sides somewhat converging to the posterior 

 border. Spiracle large, nearly circular. Capitulum: base very short 

 and broad, its posterior border straight with lateral prominences which 

 hardly amount to cornua, salient laterally in its ventral aspect ; porose 

 areas elongate piriform, the broader ends internal ; interval very small ; 

 palps short, far apart at their base, converging anteriorly, excavate 

 dorsally (especially article 3), article 2 barely longer than article 3 ; 

 hypostome narrow, lanceolate, 3 | 3 small teeth, then 2 j 2, about 6 sub- 

 equal, blunt teeth per file, a large unarmed median area. Legs: 

 yellowish brown, rather long; coxae with trenchant posterior borders 

 and with a short, strong, blunt external spur, decreasing in strength 

 from coxa I to coxa IV ; a very small ventral spur at the distal end 

 of trochanters 1 and 2. Tarsi long; tarsus 1 rather humped, tarsus 

 4 long, especially its distal article, which tapers obliquely far from its 

 termination ; pads small. 



Fig. 261. 



Fig. 262. 



Figg. 261, 262. I. tignatus ? : capitulum and scutum, left palp in profile, capitulum in 

 ventral aspect (mutilated), coxae, spiracle, tarsi 1 and 4. The hypostome (highly 

 magnified) and venter of a second specimen are shown to the right. (From specimens 

 in the Hamburg Museum. Original, G. H. F.N. del.) 



