Aedes poicilius and Ae. flavipennis were the 2 most abundant mosquito species found breeding in the leaf axils of wild banana, Musa errans botoan, at 3 different study sites on Clark Air Base, Philippines. Breeding of both species was continuous from June to March depending on the study site. Populations peaked at the height of the SW monsoon in August and September. Aedes poicilius and Ae. flavipennis immatures survived the dry season in wet detritus at the base of axils and in the few axils retaining some free water. It appeared that Ae. flavipennis had a faster development rate and a better immature survival than did Ae. poicilius. Neither species was more prevalent at a particular axil location within the banana trees sampled, and the 2 species frequently coexisted in individual axils. The distribution of both species among banana trees conformed to the negative binomial model. Other species uncommonly associated with Ae. poicilius and Ae. flavipennis in axils included: Ae. albopictus, Armigeres magnus, Ar. subalbatus, Malaya genurostris and Toxorhynchites splendens.