Houser, J.S. 1918a Destructive insects affecting Ohio shade and forest trees.. Bulletin of the Ohio Agricultural Experiment Station 332: 165-487.

Notes: Notes on appearance, life history, hosts, natural enemies, and control. Scale species reviewed incluede Aspidiotus ancylus, A. juglans-regiae, A. perniciosus, Asterolecanium variolosum, Aulacaspis rosae, Chionaspis furfura, C. gleditsiae, C. corni, C. euonymi, C. pinifoliae, C. salicis-nigrae, Chrysomphalus obscurus, Gossyparia ulmi, Kermes pubescens, Lecanium nigrofasciatum, Lepidosaphes ulmi, Neolecanium cornparvun, Phenacoccus acericola, Pulvinaria acericola, P. vitis and Toumeyella liriodendri.