1973] 
Young — Parides areas mylotes 
5 
Fig. 1. A major habitat of adult Parides areas mylotes (Bates) at Finca 
Tirimbina, near La Virgen, Heredia Province, Costa Rica. An adult popu- 
lation is found along the forest edge, and males are active in the low 
secondary growth vegetation between the forest and small river (Rio 
Tirimbina) to the left. August, 1972. 
Thus habitat selection, which can obviously be exercised only by the 
adults (since eggs and larvae are relatively fixed through the oviposi- 
tion strategy), is molded strongly in this species by two factors: 
( i ) establishment of optimal courtship sites by males in sunlight 
second-growth bordering forests or forest clearings, and (2) the 
response by mated females to become more prone to disperse in search 
for oviposition sites. Similar adult movement patterns have been seen 
at La Selva, and the lesser vagility of individual males was mentioned 
in Young (1971b). A courtship strategy in which males patrol an 
area of the habitat consistently day after day (Young, et al., in prep.) 
and mate with females as the latter emerge from their pupae, is 
optimal for butterflies in which males are shorter-lived than females, 
as is the case with Parides (Young, 1972a). But Cook et al., 
(1971) report a short life expectancy of about 10 days in P. anchises 
