240 



Genus Ixodes 



anterior third ; emargination slight ; cervical grooves superficial at first, 

 then fairly deep and diverging slightly to the middle of the postero- 

 lateral border ; no lateral grooves, punctations very numerous, deep, 

 equal. Dorsum bearing a few scattered hairs, finely striated. Venter 

 with hairs more numerous, similar striations. Vulva facing coxae IV ; 

 sexual grooves nearly straight, slightly divergent, then slightly conver- 

 gent posterior to the anus. Anus situated far posteriorly ; anal plate 

 forming an ellipse, disappearing posteriorly in a short prolongation. 

 Spiracles subcircular, whitish, very posterior, far from coxae IV. 

 Capitulum 09 mm. long; base an equilateral triangle; porose areas 

 subtriangular, broadened transversely, large, shallow, the interval wide ; 

 auricula forming a sharp retrograde hook. Hypostome long, narrow, 

 lanceolate, pointed anteriorly, with pointed teeth, numerous and small 

 in front, then 3 1 3, followed by 2 | 2 files of 12-13 teeth extending almost 

 to the base, the internal files much separated, especially posteriorly. 

 Palps long, narrow, widest in the middle of article 2, scarcely extending 

 beyond the hypostome, much separated at their base, then curving 

 inward ; article 3 elongate, nearly as long as article 2. Legs of medium 

 length. Coxa I with a very sharp, narrow, internal spur and short 

 strong external spur ; II and III trenchant on their posterior border ; 

 the trenchant edge ending abruptly externally; coxa IV with a slight 



Fig. 234. I. schillingsi ? : capitulum and scutum, capitulum in ventral aspect with 

 coxae, tarsus 4, spiracle, slightly magnified view of venter, s indicating position of 

 spiracle. Drawn from (N. 1171) co-type; presented by the Berlin Museum. 

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



