On two new species of Mallophaga (Menoponidae): Menacanthus balfouri n. sp. and Myrsidea victrix n. sp. from Colombia

several Mallophagous parasites on a " black and yellow billed Toucan."* These examples have been handed to me for report, and they are of special interest as coming from a host genus of whose parasites little is known.Two species, both Menoponids and apparently new, are represented in Dr. Balfour's gatherings.Till recently, many genera and possibly even sub-families have been confused under Menopon.In 1912, Neumann (Archiv.de Parasitol., p. 353) proposed the name Menacatithus for those forms which are provided with a pair (or more) of heavy peg-like spines on the inferior surface of the head.