254 



Genus Ixodes 



almost discoidal, salient outwardly, fused with the base; article 2 

 constricted basally, then broadening abruptly, almost twice as long as 

 article 3 ; article 4 very small, terminal. Legs 1 very short and thick, 

 coxae unarmed, flat, transversely elongated, with posterior border 

 trenchant; coxa I prolonged forward, the anterior portion slightly 

 visible dorsally ; tarsi short, humped near the tips, which taper some- 

 what abruptly. 



Fig. 251. I. vettitut ? : capitulum in ventral aspect, palp (lateral view), coxae, anal 

 grooves, spiracle. Leg 4 (less magnified). Found on Diemenia superciliosa (brown 

 snake), Herdman's Lake, near Perth, W. Australia. B. H. Woodward coll. (N. 642. 

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



Nymph (Fig. 252) : resembles the ? except in the shape of the 

 scutum, which is of the I.fecialis type, being broadest near its posterior 

 extremity. The dorsum is thickly clothed with strong white hairs. 



1 Neumann notes that leg 3, and especially coxa III, on the right side are atrophied in 

 the type ; the coxa is only half as large as the one of the opposite side. 



