14 Proceedings of the Royal Irish Academy. 



TnEE.IDIOX LETE, n. sp. 



Length, of an immature female, ^Vth. of an incli; length of the 

 cephalothorax, -oij; breadth, -jV ; breadth of the abdomen, ^\-; length. 

 of an anterior leg, i ; length of a leg of the third pair, ^2-- 



The eyes are seated on black spots on the anterior part of the eeph- 

 alothorax ; the four intermediate ones form a square, the two anterior 

 ones, which are placed on a small protuberance, being the largest of 

 the eight ; the eyes of each lateral pair are seated on a minute tubercle, 

 and are near to each other, but not in contact. The cephalothorax is 

 slightly compressed before, rounded in front, and on the sides convex, 

 glossy, and has a slight indentation in the medial line of the posterior 

 region ; it is of a yellowish-white colour, a brown band extencling from 

 each lateral pair of eyes nearly to its base. The falces are conical, 

 vertical, and have a brownish-yellow hue. The maxillae are obliquely 

 truncated at the extremity on the outer side, and inclined towards the 

 lip, which is short and pointed at the apex. These organs have a pale- 

 yellowish hue, the former being tinged with brown on the outer side. 

 The sternum is heart-shaped, convex, glossy, and of a dull yellow 

 colour, with brownish-black lateral margins. The legs are slender, 

 supplied with short hairs, and are of a pale yellowish-brown hue, 

 marked obscurely with soot-colour at the ariiculation of the joints ; 

 the first pair is the longest, then the second, and the third pair- is the 

 shortest. The palpi are short, without soot-coloui'ed marks, and are 

 terminated by a small curved claw. The abdomen is oviform, convex 

 iibove, projects over the base of the cephalothorax, and is of a dull- 

 yellowish colour, freckled with white ; a pale brown dentated band 

 •extends fi'om the anterior extremity of the upper part, along the 

 middle, about two-thirds of its length, and is followed by three soot- 

 coloui'ed lines that meet at the coccyx, the intermediate one being 

 composed of small spots ; the spinners have a brownish-black hue, and 

 the outer side of the branchial opercula is soot-coloured. 



Genus Ap.gtxodes, Simon. 



Akgyxodes E.0STEATA, n. sp. Plate 2, fig. 11, 



Length of the male, from the anterior part of the cephalothorax to 

 the summit of the abdominal cone, iV of an inch ; length of the ceph- 

 alothorax, "sV ; breadth, -gV ; breadth of the abdomen, -h^ ; length of an 

 anterior leg, \ ; length of a leg of the third pair, iV- 



The abdomen rises from its anterior extremity, which projects a 

 little over the base of the cephalothorax, into a large obtuse cone 

 greatly elevated above the spinners ; the upper part has a brilliant 

 silvery-white colour, with a brownish-black band extending along the 

 middle to the summit of the abdominal cone ; the sides, posterior face 

 of the cone, and under part are of a brownish-black colour, the last 

 having a tinge of red ; a white point is projected from the upper part 

 on each side ; a line of the same hue, bifid at its superior extremity, 

 extends along each side of the posterior face of the cone, and two small 



