Monza alberti Holland, 1896 This species is widespread through the tropical rain forest belt from Sierra Leone to western Kenya (Evans 1937, Ackery et al . 1995) and north-western Tanzania (Congdon & Collins 1998). Holland (1896) gives the type localities as valley of the Ogové [Gabon], Cameroon, and Sierra Leone. Evans (1937) notes some variation in spotting and size of adults and illustrates five pairs of different male claspers. Lindsey & Miller (1965) examined a range of material from West Africa and found that the slightly asymmetrical claspers of male genitalia fall into ‘a number of patterns’ (they illustrate five), apparently uncorrelated with differences in adult appearance or geographic distribution. Larsen (2005) acknowledges this variation, ‘just possibly encompassing several closely related species, but it will be a daunting proposition to prove this either way, demanding long series of sympatric material from several different localities and probably study of the early stages’ and molecular methods. We note that the genitalia form most commonly found in western Kenya is closest to the fifth of Evans’ (1937) forms, with two large pointed projections on each valve, or variations on this. MJWC examined 17 specimens from Kakamega Forest (seven reared); the right valve and uncus is more or less constant, but the left valve is variable. Nine had two large pointed projections; one was similar, but the distal projection was blunt; two had the distal projection partially bifurcate; three had the distal projection more or less completely bifurcate; and two showed 3–4 more or less developed pointed projections. None of these forms are included amongst the forms that Lindsey & Miller (1965) illustrate from West Africa. We hypothesise that there will be found to be at least two species within M. alberti , one from West Africa and one from East Africa. Should this prove to be the case, then M. alberti is unlikely to be the species found in Kenya, rather M. entebbea Swinhoe, described from Entebbe, ...