182 On neio Genera and Species of Araneidea. 



living spider lias power to raise and depress or expand them as a 

 peacock does its train, and that when so expanded they assist 

 to sustain the spider in its leaps. The slightly projecting lateral 

 margins of the upper epidermis a})pear also to connect this 

 spider with SaUicus volans (last described) ; and there is a general 

 similarity in the colouring of the two species : the upperside 

 of the abdomen in the present s])ider is broadly and trans- 

 versely banded with alternate and somewhat wavy bands of 

 scarlet maroon and brilliant emerald-green, changing to blue 

 with the different incidences of the light ; there are three bands 

 of the scarlet-maroon colour, and four of emerald, the foremost 

 and hindmost bands being of this latter colour; the under- 

 side is of a uniform brownish yellow, marked and spotted with 

 dark brown, and clothed Avith hoary hairs. 



Six examples of this interesting and lovely species were re- 

 ceived in 1864 from the Swan River, New South Wales. 



List of Binders described. 

 Family Colophonides. 

 Coloplion nataleiisis, n. sp., d & $ ; P- 1^0) Plate X VTI. iig. 1. Natal. 



Family Agelenides ? 

 Mutusca mammosa, n. sp., S y P- 173, Plate XVII. fig. 2. Sydney, Aus- 

 tralia. 



Family Gasteracanthides. 

 Calydna j)rospic{ens, n. sp., (J, p. 175, Plate XVII. fig. 3. Minas Geraes. 



Family Miagrammopides. 

 Miagrmmnopes Bradley i, n. sp., $ , p. 177. Nortli Australia. 



Family Thomisides. 

 Amych albomactdata, n. sp., c? & $ , p- 178. Nortli Australia. 



Family Salticides. 

 SaUicus volans, n, sp., c?, p. 178, Plate XVII. fig. 4. Sydney, New South 



Wales. 

 Salticm speciosus, n. sp., S, p. 180, Plate XVII. fig. 5. Swan River, New 

 South Wales. 



EXPLANATION OF PLATE XYll. 



Fig. 1. Colophon nntahmis, d & $ : b^ spider, enlarged ; a, ditto, in profile, 

 with legs ti'uncated ; c, eyes, from above and behind ; d, under- 

 side, showing maxillfe, labium, and spiracular orifices; e, left 

 palpus, from outer side ; /, portion of digital joint with palpal 

 organs of right palpus, from the front and behind ; g, palpal 

 organs of left palpus, fi-om beneath and in front ; h, leg of first 

 pair, 5 ; k, m, portion of tarsus of first pair, shoT\'ing tarsal 

 claws ; w, natural length of spider. 



Fig. 2. Mutusca mammosa, J : «, spider, in profile, enlarged ; b, ditto, from 

 above ; c, eyes and falces ; d, maxillae and labium : e, under- 

 side of abdomen , /, right palpus, from outer side : g, cubital and 



I 



