Essig, E.O. 1913 The yerba santa mealy bug. (Pseudococcus yerbasantae n. sp.).. Journal of Entomology and Zoology 5: 85-87.
Essig, E.O. 1913 The yerba santa mealy bug. (Pseudococcus yerbasantae n. sp.).. Journal of Entomology and Zoology 5: 85-87.