258 
Psyche 
[Vol. 92 
Fig. 1. The artificial landmark with plastic ferns attached to the top of the 
aluminum pole as a target-perching site for males of H. ustulata. 
The same procedure was followed in testing the effect of perch 
contrast. Here, mesh targets were also used, with the same dimen- 
sions as the larger target employed in the preceding experiment, but 
one target composed of plastic mesh was painted green while the 
other wire mesh target was painted flat white. 
