1980] 
Eberhard — Bolas Spider 
165 
Fig. 18. Web of mature female Cyrtarachne sp. (scale marker—5 cm.). 
line, and M. dizzydeani also sometimes limit its spinning to this 
minimum and assumes a similar hunting posture. 
C The egg sacs of species in all three genera are more or less round 
and tear-shaped, with very strong outer layers (Gertsch 1955, 
McKeown 1952, Forster and Forster 1973, Eberhard in press), 
an unusual design for araneids. The construction behavior of 
Celaenia excavata (Lowry in McKeown 1952) is nearly identi¬ 
cal that of M. dizzydeani. 
