138 
New Species of Tides 
somewhat less than their antero-posterior diameter. Palps long, article 
3 about half as long as 2, both articles slightly hollowed at the 
dorso-internal margin; article 1 a,s in I. ricinus. (Ventral aspect.) 
Hypostome tapering distally, 4 4, then 3 | 3, with 11 distinct teeth 
along the outer file which lies somewhat concealed behind the second 
file. Palpal article 1 protruding ventrally. Auriculae forming two 
slight protrusions and followed by a slight constriction of the base ; 
posterior margin slightly rounded. Venter-. Vulva between coxae IV 
or slightly in front thereof. Anal grooves rounded in front, fading away 
behind at a short distance from the anus. Spiracles transversely oval; 
macula central or nearly so. Legs : Coxa I with long pointed internal 
spur; coxae II-IV with stout external spur. Tarsi tapering step-Avise; 
pad almost as long as the claws. 
Described from five partially fed $s: one $ found on a swamp deer, 
Wen-chwan-hsien, near Si-ho-hsien, China, and four $s found on 
mask deer (same locality). The specimens, obtained by purchase 
from Mr T. V. Sherrin, Taxidermist, Hampton, Middlesex, are in 
Cambridge. (N. 1401, 1402.) 
This species is allied to 1. ricinus ; the latter differs as follows : 
Scutum appears shorter and more rounded ; palps decidedly shorter 
and broader ; hypostome much less tapering and shorter, dentition 3 j 3 ; 
spiracles sub-circular, larger in proportion to size of coxa IV; coxa I Avith 
external spur ; coxae II-IV with external spur much less marked ; tarsi 
tapering more gradually ; claws longer. 
