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Young, Allen M., and Mary Ellen Carolan
1976. Daily instability of communal roosting in the Neotropical butterfly Heliconius charitonius (Lepidoptera: Nymphali-dae: Heliconiinae). Journal of the Kansas entomological Society 49(3): 346-359, 5 figs., 6 tabs. (26 July) [behavior; Costa Rica]
Young, Allen M., and Mark W. Moffett
1979a. Studies on the population biology of the tropical butterfly Mechanitis isthmia in Costa Rica. American Midland Naturalist 101(2): 309-319, 4 figs., 1 tab. (April)
1979b. Behavioral regulatory mechanisms in populations of the butterfly Mechanitis isthmia in Costa Rica: Adaptations to host plants in secondary and agricultural habitats (Lepidoptera: Nymphalidae: Ithomiinae). Deutsche entomologische Zeitschrift (N.F.) 26(1/3): 21-38, 8 pls., 10 figs. (16 June)
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