58 
Psyche 
[June 
been labelled with a distinct color marking, these tended to flake 
off after some days, and the exact course of the migration patterns 
could therefore not be followed. However, judging from the number 
of unmarked specimens present, which outnumbered by far the calcu- 
lated maximum that could have lost its markings, it was clear that a 
substantial number of lycids were new arrivals in the test area, prob- 
ably stemming from the principal aggregation at the opposite side of 
the laboratory building. Conversely, as expected, some marked indi- 
viduals had been lured back to the front field. 
It remained to be determined what particular attracting stimulus 
is responsible for luring the lycids. Visual cues were eliminated by 
DECOY GROUP 
A 
B 
C 
D 
150 dd 
150 dd 
150 SS 
15099 
TIME(hrs.) NEWCOMER COUNT PER DECOY GROUP 
dd 
92 
dd 
92 
dd 
92 
d d 
99 
20 
39 
7 
65 
13 
4 
2 
4 
3 
45 
41 
1 6 
25 
8 
0 
1 
0 
0 
72 
29 
1 7 
S 9 
5 
0 
S 
0 
0 
D 
150 <f<f 
66 
99 
23 
12 
31 
7 
26 
13 
Table 11. Attraction of lycids to male and female decoy aggregates placed 
in nets. The four decoy groups (A-D) were placed at the corners of a 
square, roughly 25 m. to the side. The times given for the various newcomer 
counts are measured from when the decoy groups were first staked out. At 
72 hours, the females from group D were exchanged with the males from A. 
