1882.] REV. O. p. CAMBRIDGE ON NEW ARANEIDEA. 427 



fore part of the abdomen, which is of a cyhndric form, drawn out 

 into a kind of sheath, into which the distinct pedicle uniting the 

 cephalothorax and abdomen is inserted ; the cuticle of this sheath 

 runs back a long way beneath the abdomen, and includes the spi- 

 racular plates, the openings into the spiracles being thus unusually 

 approximated to the hinder part of the abdomen. 



The cephalothorax is small, oval, and without lateral marginal 

 constriction at the caput. 



Legs moderately long and very slender, furnished with hairs and 

 a very few fine spines, 1, 4, 2, 3. 



Eyes very small, rather closely grouped, and placed as in Neriene. 

 Clypeus prominent. 



Falces rather small, straight and vertical. 



Maxillcd strongly inclined to the labium, over which they almost 

 meet at their extremities. 



Labium very short, and somewhat rounded at the apex. 



CoLEOsoMA BLANDUM, sp. n. (Plate XXIX. fig. 3.) 



Adult male, length 1 line. 



The cephalothorax, falces, maxillae, labium, and sternum are of a 

 yellow-brown colour, more or less suffused with dusky brown. 

 The profile of the thorax and caput forms a slight curve to the 

 eyes ; the height of the clypeus (which is prominent) exceeds half 

 that of the facial space. 



The legs are pale yellow, a small portion at the posterior extremity 

 of the tibiae, and at the anterior extremity of the metatarsi, of those 

 of the fourth pair being of a brownish hue. 



l^he palpi are of moderate length, and of a dark suffused yellowish- 

 brown colour. The cubital joint is strong, somewhat curved, and 

 obtuse at its fore extremity, near which issues a single sinuous 

 strongish bristle ; the radial joint, which is shorter, is articulated 

 to the cubital somewhat sideways, being directed outwards from it, 

 much like that of some species of Theridion, and of a broad spread- 

 ing form at its extremity. The digital joint is large, oval, and with 

 a strong lobe on its inner side ; the palpal organs are prominent 

 and complex, with a large, strong, circularly curved tapering spine 

 at their outer side. 



The abdomen is of a cylindric form, strongly constricted across the 

 upperside near the middle; the peculiar sheath-like form of its 

 anterior extremity has been noticed above ; this part is yellow- 

 brown ; the rest is nearly black, with a very large, pale, dull yellowish 

 marking on the sides, extending to the underpart. The posterior 

 extremitj' projects over the spinners, and is obtusely rounded and 

 prominent. 



A single example of this very peculiar and delicate little Spider 

 was sent to me, among others, some years ago from Ceylon by 

 Mr. G. H. K. Thwaites. It combines characters of Neriene, Liny- 

 jthia, Theridion, and Sjohecozone, 



