1969] 
Robinson — Predatory Behavior 
489 
2. Wrapping occurs at the capture site if the prey cannot be 
pulled from the web after the immobilization bite. Such prey 
is wrapped, cut from the web, and then transported to the 
hub. This is post immobilization wrapping at the capture site, 
type 1. 
3. Wrapping occurs at the capture site after the prey has been 
freed from the web by pulling, if it is too large to be carried 
in the jaws. It is then carried, suspended on silk, from leg IV. 
This is post immobilization wrapping at the capture site, type 2. 
Wrapping by Argiope species 
The predatory behavior of Argiope argentata has recently been 
described by Robinson (1969), and further analysis is given by Rob- 
inson & Olazarri (in press). Details of the predatory behavior of 
A. savignyi and A. florida are essentially similar (Robinson & Rob- 
inson, in prep.). 
All the above species of Argiope , and many other araneids, use 
silk as an attack weapon, prior to biting, and in this respect their 
predatory behavior differs fundamentally from that of Nephila clav- 
ipes. The Argiope species also wrap prey in silk in other circum- 
stances : 
1. Prey which have been seized in the jaws and pulled from the 
web are subsequently wrapped at the hub (see Nephila 1.). 
Prey wrapped at the capture site but transported to the hub 
in the jaws are also wrapped at the hub. This is post immobili- 
zation wrapping at the feeding site. 
2. Prey which have been immobilized by biting are wrapped at 
the capture site following the long bite. The greater propor- 
tion of lepidopteran prey is treated in this way. This is post 
immobilization wrapping at the capture site. 
3. Prey which are carried in the jaws and become tangled in the 
web during transportation are wrapped and carried on silk. 
This is post immobilization wrapping during transportation. 
Immobilization wrapping, post immobilization wrapping at the 
capture site, and post immobilization wrapping during transportation 
also occur in the case of Araneus diadematus (Peters 1931, 1933a, 
1933b). 
Two forms of immobilization wrapping occur in A. argentata 1 A. 
savignyi and A. florida. These differ in the initial behavioral com- 
ponent which has been called throwing (Robinson 1969). In this 
behavior the spider throws skeins of silk over the prey, using both 
