176 Rev. O. P. Cambridge on some new 



is pale brownish yellow, the anterior portion of the femora of 

 the fourth pair suffused with sooty brown ; those of the first 

 and second pairs have the genual and femoral joints darker 

 yellow-brown, the latter suffused with a deeper hue towards 

 their fore extremities, the tibiae, tarsi, and metatarsi being of 

 a sooty brown. 



The palpi are short, and similar to the legs in colour ; the 

 humeral, cubital, and radial joints are not strong ; the two 

 latter are very short, the radial being rather the longest 

 and of an oval form, but apparently without prominence or 

 apophysis : the digital joint is very large, and oval in form : 

 the palpal organs are directed outwards, very prominent, 

 highly developed and complex, consisting of strong corneous 

 lobes, processes, and spines. 



The falces are long and strong, well rounded and slightly 

 prominent near their base in front ; they are rather directed 

 backwards ; looked at from the front their sides are hollow, 

 and they are somewhat depressed near their extremities in 

 front ; their colour is similar to that of the cephalothorax, 

 and the fangs are short and strong. 



The maxilla?, labium, and sternum, whose form and structure 

 have been described above among the characters of the genus, 

 are of a dark reddish yellow-brown colour. 



The abdomen is broader than long, of a subtriangular form 

 with the corners rounded; its upper integument is corneous 

 and moderately convex, of a dull suffused yellowish-brown 

 colour, minutely mottled (in spirit of wine) with yellow points, 

 marked also rather obscurely with depressed spots of a darker 

 hue, and some pale brownish-yellow lines ; the underside is 

 dusky brownish yellow, suffused on the sides (where it is 

 obliquely rugulose) with greenish black : the spinners are 

 short, six in number, and placed in a compact group beneath 

 the hinder part of the abdomen, but some distance in front of 

 the termination of the corneous epidermis : the pedicle con- 

 necting the abdomen and cephalothorax is joined at its fore 

 extremity, by a projecting process, to the hinder part of the 

 sternum. 



A L single adult male of this spider was received from 

 Minas Gerae's, Brazil, where it was found by Mr. Henry 

 Rogers in 1870. It is generically allied to Cyrtogaster (Keys.) 

 [changed to Cyrtarachne, Thor.], Eurysoma (Koch), and Oas- 

 teracantha (Walck.) ; but its various peculiarities of structure 

 appear to make it necessary to found a new genus for its re- 

 ception. 



