Bray, D.F. 1974 . The Fieldman's Guide to Entomology. Cooperative Extension Service, University of Delaware 33 + xviii pp.

Notes: The first part of this book was prepared as a handbook for identifying insects for a short course given by the author. Appendix I is a 22 page section called A Field Guide to the Scale Insects of Delaware. 21 scale insects are reviewed in a table, namely Abgrallaspis (=Aspidiotus) ithacae, Aspidiotus forbesi, A. uvae, Aulacaspis rosae, Carulaspis visci, Chionaspis americana, C. furfura, Diaspidiotus ancylus, D. liquidambaris, D. osborni, Fiorinia externa, Ischnaspis longirostris, Lepidosaphes ulmi, Lopholeucaspis japonica, Melanaspis (=Chrysomphalus) obscurus, M. tenebricosa, Phenacaspis pinifoliae, Pseudaulacaspis pentagona, Quadraspidiotus juglansregiae, Q. perniciosus and Unaspis euonymi.