. Bulletin. Natural history; Natural history. 144 Illinois Natural History Survey Bulletin Vol, 33. Art. 3. Fig. 1. — (A) Egg of Aellopos titan laid on a spine of Randia subcordata at ttie time of budbreak. (B) Accumulated eggs of A. titan following multiple ovipositions over several days on R. subcordata (C) Egg of A. titan laid on tfie underside of an expanding new leaf of R. subcordata- 30 May 1983, Santa Rosa National Park, Costa Rica. From the outset, the number of eggs present on a given plant was the prod- uct of several processes. Even while females were ovipositing, eggs were be- ing
. Bulletin. Natural history; Natural history. 144 Illinois Natural History Survey Bulletin Vol, 33. Art. 3. Fig. 1. — (A) Egg of Aellopos titan laid on a spine of Randia subcordata at ttie time of budbreak. (B) Accumulated eggs of A. titan following multiple ovipositions over several days on R. subcordata (C) Egg of A. titan laid on tfie underside of an expanding new leaf of R. subcordata- 30 May 1983, Santa Rosa National Park, Costa Rica. From the outset, the number of eggs present on a given plant was the prod- uct of several processes. Even while females were ovipositing, eggs were be- ing carried off by Pseudomyrmex, Azteca, Crematogaster, and other ants, picked off by warbler-sized and -shaped birds, and fed on by anthocorid bugs. The eggs hatched 5-6 days after ovi- position; even as the first were hatch- ing, more were still being laid. While minute parasitic Hymenoptera were observed ovipositing in the eggs in the field, no parasitoids were reared from a sample of 682 eggs collected from 24 different R. subcordata plants, and no parasitoids appeared when 100 of these eggs were reared to the adult stage. The first-instar larvae are pale green, match well the color of the new- ly expanding Randia leaves, and wander widely through the foliage of the plant on which they hatch. They appear to be highly edible to the ants and birds mentioned above, reduviid bugs, Fblistes wasps, other wasps, small spiders, and carabid beetles; all of these animals were observed to capture and eat them or carry them off on numer- ous occasions. By 4-7 June, tens to hundreds of first- or second-instar A. titan larvae could be found on any Ran- dia more than 1 m tall, and some lar- vae were present even on plants as small as 30 cm in height. On all plants the larvae appeared to be healthy and were feeding heavily. I was absent from the site 8-13 June, and upon my return, it was evi- dent that the outbreak had developed to the extent that three levels of defoli- ation could be recog
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