1 80 Rev. O. P. Cambridge on some new 



6' 



the hinder part is striped transversely, but, except the first of 

 the stripes, not so distinctly, with similar colours ; the lateral 

 flaps are of a soft yellowish colour, tinged with olive-green, 

 and each is marked with two somewhat oblique, curved, narrow 

 stripes or lines of greyish green, following nearly the curve of the 

 hinder part of the flap, and thickly fringed with greyish hairs. 

 The underside of the abdomen is of a dull brownish-yellow 

 colour, marked longitudinally, but not very regularly, with dark 

 brown ; and the underside of the flap is of a uniform, pale, 

 dull yellowish hue : four small black impressed points form a 

 quadrangular figure near the middle of the upperside of the 

 abdomen ; and there are numerous upturned, bristly, black 

 hairs just beneath the fore extremity. 



It is difficult to describe adequately the great beauty of the 

 colouring of this spider ; but the unique lateral flaps or appen- 

 dages of the abdomen will serve to distinguish it readily from all 

 other at present known Saltici. It is probable, from the great 

 development of these flaps, as above described, that they are 

 sexual ; but no doubt the female, when discovered, will have 

 some traces of them more or less developed. Mr. H. H. B. 

 Bradley, of Sydney, New South Wales, to whom I am indebted 

 for examples of this exceedingly interesting and remarkable 

 spider, tells me that he has observed them elevating and de- 

 pressing the flaps, and also actually using them as wings or 

 supporters to sustain the length of their leaps. That this, as 

 with an analogous appendage in the flying squirrel, should 

 be intended for such sustentation, one could have but little 

 doubt after examining it even in the preserved specimens. It 

 appears to be a very rare spider, Mr. Bradley having been 

 able to procure but three examples (all males in the adult 

 state) during many occasions of special hunting for it. The 

 three examples were all found on one spot near Sydney in the 

 month of October, running and jumping on low plants and 

 flowers. 



Salticus (Attus) sjjeciosus, n. sp. Plate XVII. fig. 5. 



Adult male, length nearly 2| lines. 



The ceplialothorax of this beautiful species is of ordinary 

 form ; its colour is a dark reddish brown, nearly black on 

 the quadrangular area enclosed by the eyes ; this space is 

 clothed with short reddish-yellow hairs, mixed with others 

 fewer and longer, both dark-coloured and of a hoary hue, the 

 latter chiefly round the eyes on the anterior portion : the lower 

 part of the sides all round is thinly clothed with fine hoary 

 hairs ; and there is a largish, oblong, longitudinal, central 



