56 
Psyche 
[June 
another, were lured back to the main standing aggregate in the front 
of the building. Instead of being scattered individually, the lycids 
were then put out in a number of isolated incipient aggregations to see 
whether these would tend to consolidate and attract newcomers. This 
they were found to do. Five groups of L. loripes, each comprising 75 
individuals of both sexes, were placed on single Melilotus plants (or 
on compact clusters of branches) in such a way that three of the 
groups were closely spaced and roughly equidistant (5-6 m.), whereas 
the other two were spaced about 25 m. from each other and from the 
center of the triangle formed by the other three. Within five days 
(see Table I) the three closely spaced aggregations became consoli- 
dated around one of the loci, which now numbered 390 individuals. 
The two neighboring clusters had dwindled to 27 and 1 respectively. 
Recruitment had taken place also from the two outlying clusters, 
one of which had disappeared altogether, while the other now had 
only 15 lycids. Although the individuals of each lot had originally 
AGGREGATION 
1 
11 
IH 
IV 
V 
TIME (hrs.) 
LYCID COUNT PER AGGREGATION 
0 
75 
75 
75 
75 
75 
4 
22 
23 
35 
35 
82 
30 
2 
21 
30 
9 
178 
56 
2 
21 
26 
3 
309 
1 1 9 
0 
15 
27 
1 
390 
LYCIDS 
ELSEWHERE 
5 
5 
30 
24 
30 
Table I. Fate of five artificially-established incipient aggregations (each 
consisting of 75 lycids of both sexes) observed over a period of five days. 
Aggregations III, IV, and V were 5-6 m. from one another. Aggregations 1 
and II were 25 m. from each other and from the center of the triangle formed 
by the other three. The times given for the various counts are measured from 
when the aggregations were first put in the field. The column on right gives 
the lycid count for the entire remainder of the Melilotus test patch behind the 
laboratory building. 
Explanation of Plate 4 
Figure 1. One of the nets (enclosing Melilotus with lycids) used as a lure. 
This particular net, which held males alone, was one that successfully attract- 
ed other lycids (a few of the newcomers are seen on the net itself). 
Figure 2. Group of male lycids, in the typical sequential arrangement they 
often assume when confined by themselves. 
