1938 ] 
“Shuttling” in Argiope aurantia 
71 
is briefly reviewed. So far as the other species were avail- 
able, they were studied in the same manner as A. aurantia; 
but relative scarcity of individuals ( e.g ., E. stellata) and/or 
differences of habit {e.g., E. strix) interfere with close com- 
parisons. The following gives the writer’s view of the 
evidence from these observations for the absence of shuttling 
as a comparable response pattern in the species concerned 
(there is at hand no evidence of its presence) : 
adolescent 
adult 
day 
night 
A. trifasciata 
good 
good 
only 
none 
C. conica 
fair 
good 
only 
none 
E. cavatica 
fair 
good 
good 
good 
E. domiciliorum 
meagre 
fair 
fair 
fair 
E. insularis 
meagre 
good 
X 
only 
E. stellata 
meagre 
fair 
only 
none 
E. strix 
good 
good 
X 
only 
E. tri folium 
meagre 
good 
X 
only 
The apparent 
absence of 
the pattern 
in 
trifasciata, 
aurantia' s near biological relative, will be noted. C. conica 
and the Argiopes are normally at orb-centre by daylight; 
E. cavatica, E. domiciliorum and E. stellata may be either at 
orb-centre or in retreat. E. insularis, strix and trifolium are 
normally in retreat during daylight. The effect of night on 
the shuttling behavior of A. aurantia also awaits further 
study; the general tendency of the observations is however, 
that the behavior of the various species concerned is more 
aggressive at night. 
