Alvarado, J.A. 1939 . Los insectos dañinos y los insectos auxiliares de la agricultura en Guatemala. Guatemala, C.A. 285+ pp.

Notes: Species discussed include Pseudococcus citri, P. longispinus, P. sacchari, P. radicis, Saissetia hemisphaerica, Ceroplastes floridensis, C. cirripediformis, Aspidiotus destructor, Mytilaspis citricola, Aspidiotus ficus, Lecanium hemisphaericum, Ceroplastes giganteus, Icerya purchasi, Coccus viridis, Chionaspis citri, Aulacaspis rosae, Aleyrodes citri and A. brassicae.