The genus Phyllergates contains one species, which all Indian writers have hitherto placed with Orthotomus. Sharpe has separated the present genus from Orthotomus on account of its differently-shaped tail and bill, but he has kept it in the section of the Cisticolae with 12 tail-feathers. This is of course wrong, as Phyllergates has only ten rectrices.
This genus differs from Orthotomus in so many characters that there is some doubt whether it is as closely allied to that generic type as it is to Abrornis and Tickellia, with which two genera it has many characters in common, such as the broad blunt bill and the slightly graduated tail of 10 feathers. It is, moreover, so similar to T. hodgsoni in coloration that at first sight they appear inseparable. Jerdon's account of the nest of P. coronatus is very likely to be wrong, as he did not find it himself nor did he pay any great attention to nidification, and I should not be surprised to learn hereafter that the Golden-headed Warbler, like Abrornis, constructed its nest in a hole of a tree.
In this genus the spring moult appears to have no effect on the colour of the plumage, and certainly none on the shape and Length of the tail.