428 REV. O. p. CAMBRIDGE ON NEW ARANEIDEA. [May IG, 



Genus Sphecozone ', Cambr. 



Sphecozone NIGRA, sp. D. (Plate XXIX. fig. 4.) 



Adult male, length 1 line. 



The whole of ihe fore part of this Spider is deep brown-black, 

 the falces and the extremities of the legs being rather the brownest ; 

 and the abdomen is black. 



The general form and structural characters are very similar to 

 those of S. ruhescens, Cambr., the type of the genus ; the Spider, 

 however, is smaller, and differs totally in colours and in the structure 

 of the palpal organs. Several bristly hairs spring from the upper- 

 side of the caput, some from the ocular area curving towards and 

 meeting others (stronger ones) curving towards them from the 

 occiput, 



The palpi are of moderate length ; the radial joint is of a some- 

 what similar cup-shape to that of S. ruhescens, but not nearly so 

 large or developed ; the fore extremity on the upperside is produced 

 and prominent, terminating in a bifid form. The digital joint is 

 large and oval, but rather strongly and irregularly indented on the 

 outer side towards its base. The palpal organs are highly de- 

 veloped, prominent and complex, consisting of several very marked 

 corneous spines and processes; one of the spines is of very great 

 length, black, slender, tortuous and convoluted, ending iu a long 

 hair-like point. 



Received iu Mr. Traill's Amazon collection. 



AchjEA, g. n. 



The little Spider on which this genus is based is closely allied to 

 Theridion, Walck. ; but the large size and prominence of the fore 

 central pair of eyes, as well as the obtusely humped posterior ex- 

 tremity of the abdomen, appear to exclude it from that genus. 

 The eyes also (among other characters) separate it from Thwaitesia, 

 Cambr., and Chrysso, ejusd. 



In the only example examined the legs of the fourth (or posterior) 

 pair were wanting ; but from the lengths and proportions of the 

 three other pairs I should judge their relative lengths to be 1, 4, 2, 3. 

 The legs are rather slender and tolerably long, furnished with hairs 

 only, excepting three or four spines beneath the femora of those of 

 the first and second pairs ; each tarsus ends with three claws. 



MaxillcB and labium as in Theridion. 



Cephalothorax short and broad, with little or no lateral marginal 

 constriction at the caput. 



Abdomen short, somewhat cylindric in form, bluntly produced, 

 hut not to any great extent, at its posterior extremity ou the upper- 

 side ; probably the female would present this character iu a much 

 stronger degree. 



AcH^A iNsiGNis, sp. u. (Plate XXX. fig. 5.) 



Adult male, length 1 line. 



The whole of the fore part of this Spider is of a clear reddish 



P. Z. S. 1870, p. 733, pi. xliv. fig. 3. 



