Newstead, R. 1900 Observations on Coccidae (No. 18).. Entomologist's Monthly Magazine 36: 247-251.
Notes: Dactylopius glacialis, D. formicarius, Ripersia wasmanni, n. spp., Perissopneumon ferox n. gen. and sp.; notes on 2 other scale insects.
Newstead, R. 1900 Observations on Coccidae (No. 18).. Entomologist's Monthly Magazine 36: 247-251.
Notes: Dactylopius glacialis, D. formicarius, Ripersia wasmanni, n. spp., Perissopneumon ferox n. gen. and sp.; notes on 2 other scale insects.