4,'^0 REV. O. p. CAMBRIDGE ON NEW ARANEIDEA. [May 16 



yellow colour ; the two terminal joints of the palpi (in the female) 

 black-brown, and the tarsi of the legs tinged with dark brown. 



The palpi are short and slender, excepting the digital joints of 

 those of the male, which are very large and of a dark yellow-brown 

 hue ; the palpal organs are highly developed and complex, with a 

 closely connected, long, rather strong, sinuously curved black spine, 

 whose origin is near iheir centre, and its long, filiform, slender point 

 ends near their extremity. The length of the digital joint is nearly- 

 equal to that of all the rest of the palpus ; the radial joint is very 

 short and spread out, the cubital equally short but of a somewhat 

 nodiform shape. 



The abdomen of the female has its posterior extremity drawn out 

 into an obtuse point, the distance of which from the spinners is in 

 some cases equal to that from the spinners to the fore extremity of 

 the upperside of the abdomen, wbile the abdomen of the male has 

 the posterior extremity only slightly and very obtusely produced. 

 The colours and markings are similar in both sexes, the ground- 

 colour being of a dull luteous clay-yellow, with a long, tapering, 

 white, central longitudinal baud on the upperside, broken up into 

 more or less separated blotches and spots, and a longitudinal row of 

 large white blotches on each side. The posterior extremity is tipped 

 with black ; and there are also four rather suffused black markings 

 near the upperside, one on each side towards the fore part, and tlie 

 other two near the beginning of the produced portion. The genital 

 aperture of the female is of a simple, somewhat semicircular form. 



Examples of both sexes were contained in Mr. Traill's Amazon 

 collection. 



Chrysso? quadrata, sp. n. (Plate XXX. fig. 7.) 



Adult female, length 2 lines ; adult male, I5 line. 



It is with some hesitation that 1 include this Spider in the above 

 genus ; it differs from C. alboniaculata (the type species) in a 

 more raised ocular region and a slightly different relative size of the 

 four central eyes. The labium also is broader at the apex. 



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

 clear slightly orange-yellow colour ; the basal half of the femora of 

 the legs is also of a similar hue, the remainder, with the tibise, tarsi, 

 and metatarsi being dark, varying to a deep blackish red-brown. The 

 radial and digital joints of the palpi are also dark brown. 



The four central eyes do not differ much in size ; they form a 

 quadrate figure whose width is slightly greater than its length ; taken 

 in two rows, the eyes of each row are as nearly as possible equidistant 

 from each other. 



The legs are moderately long, 1 , 4, 2, 3, slender, and furnished with 

 hairs only. 



The falces are of moderate length, straight, vertical or very 

 nearly so. 



The maxillcB are rather long, pointed at their extremities, and 

 inclined towards the labium. 



