This paper presents further biological and ecological data on the Chrysopidae gathered during a study of the predators of the oriental fruit moth. The species concerned are Chrysopa rufilabris Burm.; C. plorabunda Fitch; C. downesi R. C. Smith; C. oculata Say; C. nigricornis Burm.; Meleoma signoretti Fitch and M. emuncta Fitch. Data on life history include relation of development to temperature, number of generations, method of overwintering, and oviposition. The early stages of C. downesi, M. signoretti and M. emuncta are described. Seasonal prevalence and fluctuations in abundance from year to year are discussed and notes are given on natural control agencies. The value of chrysopids in the biological control of the fruit moth is summarized, with the conclusion that only in exceptional seasons are they of appreciable importance.