Subsp. impressifrons ^HNS Wasm.

Ph. megacephala impressiceps ^HNS Wasm., 1904, Notes Mus. Leyden, vol. 15, p. 72 (nec Mayr).

Ph. megacephala impressifrons ^HNS Wasm., ibid., p. no.

Ph. punctulata impressifrons ^HNS For., Rev. Zool. Afr., vol. 2, 1913

Ph. rotundata var. impressifrons ^HNS For., in Lamborn, Tr. Ent.

Soc. London, 1914, p. 443.

Var. atrocior ^HNS Sant., in litt.