No. 2.] SPIDERS OF THE MARPTUSA GROUP. 121 



The cephalothorax is very low, flat and wide — two-thirds 

 as wide as long. The widest point is behind the dorsal eyes. 

 The sides are almost vertical. The cephalic and thoracic parts 

 are on the same plane. The quadrangle of the eyes is nearly 

 twice as wide as long, is equally wide in front and behind, or 

 very slightly wider behind, and occupies about one-third of 

 the cephalothorax. The first row is straight, or a little curved 

 downward ; the eyes are sub-touching, or slightly separated, the 

 middle being less than twice as large as the lateral. The 

 second row is half-way between the first and the third rows, or 

 is slightly nearer the first. The third row is nearly as wide as 

 the cephalothorax. 



This genus differs from Goleta in the width of the quad- 

 rangle of the eyes and also in the broad cephalothorax and ab- 

 domen. In Holoplatys the cephalothorax is nearly twice as 

 long as wide, although it is not at all slender, and the quad- 

 rangle is only one-fourth wider than long. 



We have, of this genus, two new species and two old ones — 

 Rudra geniculata P., Attidaj of Guatemala, Proc. Nat. Hist. Soc. 

 of Wisconsin, Dec, 1885, p. 77, and (Attus) Waga3 Tacz. Ara- 

 neides de la Guj^ane Frangaise, p. 10. 



RUDRA POLITA SP. NOV. 



Plate XII., Figs. 4— 4a. 



$ . Length, 7. Length of cephalothorax, 3 ; width of ce- 

 phalothorax, 2. 



Legs, 1423 ; those of the first pair much the stoutest and 

 longest. 



The cephalothorax is long, low and wide. The cephalic 

 part is very slightly inclined ; otherwise the upper surface is 

 almost flat throughout the entire length. The sides are a little 

 rounded out in the thoracic' part. The first row of eyes is 

 straight ; the middle are nearly twice as large as the lateral and 

 are a little separated from them. The second row is very 

 slightly nearer the first than the third. The falces are short, 

 stout and vertical. The clypeus is very narrow. The labium 

 is plainly longer than wide. The maxillee are rounded and are 



