Summary.This group is admittedly difficult, not only in distinguishing between the species, especially where, in the majority of specimens, no habitat is given on the labels, but even when this has been done, in distinguishing the recognizable races.Zosterops eurycricotusandZosterops kikuyuensisare not so difficult if the eye‐ring and broad yellow forehead are carefully compared. These two species may be confused withZosterops virens jacksoni, but the) have a larger eye‐ring and a broader and bright yellow forehead.Zosterops senegalensisis variable individually and alters somewhat between fresh and worn specimens, the young bird being rather darker than the adults. This species is always brighter above and clearer yellow below thanZosterops virensand, except forZosterops S. anderssoni, has a shorter bill and the black at the base of the bill does not extend well up on to thc lores.Zosterops s. anderssonican be distinguished fromZosterops virens stierlingiby the brighter upper side and the rather clearer yellow below, but the bill is not shorter and the black at the babe of the bill in some specimens extende on to the lores, and these specimens can only be distinguished by very careful comparison of colour in a aeries.WithZoskrops virensthe females are generally rather greener above and duller below than the males, and the young bird is even more dull.Zosterops v. jacksoniandZosterops v. schoanaarc quite well defined races, butZosterops v. stuhlmanniandZosterops u. sterlingiare very close and can only be dist, inguished one from the other in a series, when a differential general tone of colour is observable and which precludes them being placed as synonyms of each other. We can see no character by which the rows we have placed as synonyms can be recognized. In bothZosterops senpgalemisandZosterops oirenethere is some individual variation. and there is no evidence that there is any seasonal change of dress.The habitats given by collectors forZosterops senegalensisandZosterops virensseem to show that both these species inhabit the same type of country, and although it can be said that the former inhabits more open and dryer country,i. e., the open hush, savannahs and gallery forests, there is little doubt that in search of food, and perhaps more especially when in mixed bird parties, both species may be found in the same type of country, and the habitat as given under A and B must be considered as only generally correct and, perhaps, more so in the breeding than the non‐breeding season. In view of the confusion that has existed between the species some of the published field notes may be unrel