172 PECKHAM. \\o\. 2, 



The falces are parallel, short and weak. The cephalothorax 

 is dull black, covered with little punctate spots. It is thinly 

 covered with short, white hairs. The abdomen is almost circu- 

 lar in outline, and is black and glabrous, with a few white hairs 

 at the anterior end. The clypeus is covered with white hairs, 

 which grow toward each other, their insertion being at each 

 side at the outer edge of the large middle eye, and their tips 

 meeting in the middle line. The legs are dark brown, the 

 metatarsi and tarsi being a little lighter thanthe other joints. 



We have one male from Zanzibar, .sent us by M. Simon. 



ZYGOBALLUS PECKHAM. 

 Plate XVI., Figs. 4— 4c. 



The cephalothorax is high, and a little longer than wide. 

 It is widest at the dorsal eyes and contracts in front and behind. 

 The sides are not quite vertical. 



The quadrangle of the eyes is one-fifth wider than long, 

 is plainly wider behind than in front, and occupies three-fifths 

 of the cephalothorax. The thoracic part falls steeply from the 

 dorsal eyes. The first row of eyes is very slightly curved. The 

 middle eyes are sub-touching, and are nearl}^ twice as large as 

 the lateral, which are a little separated from them. The second 

 row is plainly nearer the first than the third row. The third 

 row is as wide as the cephalothorax at that place. 



Z^'goballus is a very distinct genus, containing numerous 

 species. Wo have in our collection, bettini P., the type, and 

 sex-punctatus Hentz, from the United States, both described in 

 N. A. Attidse, p. 89; terrestris Enierton, New England Attidte, 

 Trans. Conn. Acad., Vol. VIII., Oct., 1891 ; rufipes P., New 

 Attidse from Eastern Guatemala, Proc. Nat. Hist. Soc. of Wis., 

 Dec, 1885, p. 8'2, and a new species, suavis, from .Jamaica. All 

 these species strongly resemble each other, and the males, so 

 far as we know them, have their falces obliquely directed, with 

 long fangs, and a strong vertical apophysis coming down from 

 the proximal end of each falx, on the inner side. 



For a drawing of the dorsal view of the female of Zygo- 

 ballus terrestris, see Plate XVI., Fig. 5. 



