292 Transactions. — Zoology. 



are only about ^in. The colour, dorsally, is a dirty-white or 

 very pale buff, with a slight nacreous tinge ; ventrally, the 

 same, or a little lighter; the dorsal cephalic shield is brown. 

 The feet and the rostral palpi are orange, the rostrum itself 

 pale-yellow. 



The male may be recognised by its smaller size (about 

 lin.), its darker orange-red colour, and apparent absence of 

 the dorsal shield, which, however, is represented by a pro- 

 tuberance of the same orange colour. 



The skin of the female is marked with great numbers of 

 very delicate transverse striae, set close together ; the shield 

 is smooth, and exhibits no pits or spots. There are no hairs, 

 either dorsal, marginal, or ventral, on the body. The dorsum 

 has two longitudinal grooves extending from near the shield 

 to near the anal extremity ; ventrally there are two similar 

 grooves and a median terminal shallow depression in which is 

 situated a small tubercular anal organ. The feet are rather 

 long and strong, seven-jointed, terminated by two slender 

 claws having beneath them an elliptical pad. On each side 

 of the body there is a large circular spiracle. There are no 

 eyes. The rostrum is protruded, cylindrical, straight, covered 

 with longitudinal series of small recurved hooks ; the palpi 

 are four-jointed, curved inwards, and shghtly clavate, with a 

 few hairs at the tip. 



The mouth and foot of the male do not appear to differ 

 from those of the female. 



Hab. In New Zealand, parasitic on the North Island kiwi 

 (Apteryx mantelli). Found in the forest-ranges inland of 

 Mount Egmont. 



Ixodes aptericola, sp. nov. Plate XVII., figs. 7, 8. 



Body of female reaching nearly -|^in. in length. Colour a 

 dull dirty yellow, both dorsally and ventrally, with a very 

 small brown dorsal shield ; feet and mouth-organs orange-red. 

 Skin marked with numbers of transverse striae, which are 

 rather coarse and strong. There are two ventral longitudinal 

 grooves, but apparently none on the dorsum. Feet and palpi 

 as in I. apteridis, but the rostrum has only a few hooks at the 

 tip and none on the shaft. The body has no dorsal, marginal, 

 or ventral hairs, and the very small shield exhibits no pits or 

 marks. 



Hab. In New Zealand, on the South Island kiwi {Apteryx 

 australis), Dusky Sound. 



The large size, the colour, the absence of dorsal grooves 

 and rostral hooks, and a few other particulars distinguish this 

 from I. apteridis. It differs from I. eudyptidis, Mask. (1884), 

 on the penguin, also found in Dusky Sound, in the absence of 

 hairs on the body and of pits on the shield. 



