1977] 
Randall — Green Lynx Spider 
287 
1cm 
1cm 
A 
B 
Figure 1 . Peucetia viridans. A, newly formed egg sac. B, egg sac after opening 
and tilting by the female (arrow indicates lowest bowl/ lid juncture). 
construction is initiated by the spider spinning a silk disc under 
which a silk bowl with an opening in the bottom is formed. The 
egg sac is oriented in the upright position (Fig. 1A). The female 
forces eggs up into the bowl and seals the egg sac when oviposition 
is completed. The eggs hatch in 1 1-16 days depending on tempera- 
ture and the spiderlings emerge from the egg sac 10-13 days after 
hatching. 
During early September 1974, 63 adult female P. viridans with- 
out egg sacs were collected. The spiders were maintained individu- 
ally in the laboratory. The rearing containers were examined daily 
for the presence of egg sacs. 
Egg sacs collected from the laboratory specimens were used to 
establish three distinct groups of egg sacs. The establishment of 
the experimental groups is described below. 
GROUP I: Egg sacs without maternal care. 
On 16 October 1974 10 female P. viridans constructed egg sacs. 
The egg sacs were removed in separate containers. Group I egg 
sacs went through development without an adult female ever being 
present. 
Methods 
