Miller, G.L., & Williams, M.L. 1990 Tests of male soft scale insects (Homoptera: Coccidae) from America north of Mexico, including a key to the species.. Systematic Entomology 15: 339-358.
Notes: Abstract: Tests (pupal covers) of 28 spp. of male Coccidae, representing 15 genera from America north of Mexico, are described & illustrated; all exhibit morphological differences; key given. Keywords: males.