Superfamily Argiopoidea 



The egg-sac has been figured by Emerton, who first described 

 the species. It is of the form shown in Fig. 460, of a dark brown 

 colour, and very firm in texture. The egg-sac was found in Oc- 

 tober in Connecticut and the young emerged in June. 



This species occurs in the Northern States. 



Genus KAIRA (Kai'ra) 



The cephalothorax is longer than broad, moderately arched, 

 and without horny outgrowths. The abdomen has a hump on 

 each side at the base which bears irregular tubercles (Fig. 461). 



The following is the only species reported from the United 

 States: 



Kaira alba. — The female (Fig. 461) measures about one third 

 inch in length. The cephalothorax is triangular ovate, widest 

 near the base, and yellowish brown in colour. The abdomen is 

 subglobose, with hump on each side at the base; each hump bears 

 numerous conical tubercles. The abdomen is chalky white, mot- 

 tled with blackish spots, and with an indistinct folium. 



This species occurs in the Southern States. It is the Epeira 

 alba of Banks's Catalogue. 



'&>*■ 



Genus CYCLOSA (Cyc'lo-sa) 



The eyes are subequal; the posterior median are almost in 

 contact; the median ocular area is wider in front than behind; 

 both rows of eyes are recurved; the head and thorax are separated 

 by a deep cervical groove, in the female at least (Fig. 462). 



Five species have been described from the United States; 

 these can be separated as follows: 



A. Caudal end of abdomen bifurcate. P. 453 C. bifurca 

 AA. Caudal end of abdomen not forked. 



B. Abdomen extremely long. P. 453 C. caroll 



BB. Abdomen not extremely long. 



C. Abdomen with five tubercles, a pair near the base, a 

 caudal tubercle, which is divided, and one on each 

 side of this. P. 454. C. walckenari 



CC. Abdomen with less than five tubercles. 



450 



