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Annals of the Transvaal Museum 
antedates Graucalus caeseus (Vieillot). Coracina is said to be preoccupied, 
so that the generic name of Graucalus must be used. 
With regard to the genus Gampephaga, we are beset with a problem 
as to whether C. sulphur ata (Lcht.) is synonymous with C. hartlauhi 
(Salvad.), or whether two species occur side by side with the only difference 
between them so far detected that the latter has a yellow shoulder patch 
which the former lacks; no difference has been observed between the 
females. In the long series in the Transvaal Museum there are two types 
of females recognisable on the shape of the tail feathers, one of them with 
the tips of the outer tail feathers more rounded, the other with the tips 
distinctly pointed ; and moreover, of the yellow-shouldered males there are 
eight specimens and a like number of females with the outer tail feathers 
pointed, while of the other species there are twenty adult males and a like 
number of immature males and females with the tips of the outer tail 
feathers not pointed ; adult males of both species have the tail feathers of 
the blunted type. It seems possible that the shape of the tail feathers is 
a distinguishing character in the one sex and the yellow shoulder patch 
characteristic of the other sex, and further observations upon this point 
are desirable. Neither the colour of the shoulders in the male nor the shape 
of the tail feathers in the female appears to be affected by age or season, 
and since we find a similar difference in the colour of the males in species 
occurring side by side beyond our limits, it would seem that there is a 
generic difference between them which is not readily perceptible in the 
structural characters. 
Pychnonotidae 
Oberholser [Smiths, coll. Quart. R.I. pp. 149-172, 1905) has recognised 
twenty-two genera of Green Bulbuls, four of which occur within our limits, 
namely, Andropadus, Phyllastrephus, Chlorocichla and Arizelocichla. I 
would go further and recognise Phyllostrophus jiavostriatus Sharpe as a 
genus distinct from P. terrestris, the bill being more arched, the tail shorter 
in proportion to the wing, colour greenish with yellow stripes below, arboreal 
instead of terrestrial habits and an entirely different call-note. I therefore 
propose to make P. flavostriatus Sharpe the type of a new genus, Ayre- 
siLLAS. Andropadus dehilis W. L. Sclater has much in common with 
Ayresillas, but differs markedly in its shorter and more flattened bill, and 
I therefore propose to place it in a new genus, Sclaterillas. 
Phyllastrephus capensis should bear the earlier name of P. terrestris 
according to Sclater (Ibis, 1911, p. 297). To our list should be added P. 
terrestris suahelicus Reichenow, which occurs in the Lower Zambesi Valley, 
P. terrestris intermedius Gunning and Roberts [Ann. Transvaal Mus. iii. 
1 15, 1911) from the neighbourhood of Delagoa Bay and P. terrestris 
rhodesiae Rbts. [idem, v. 258, 1917) from the Upper Zambesi Valley. In 
the last paper (p. 259) I have also described a new subspecies, Andropadus 
importunus noomei, which must be added to our list ; reference was here 
made to a specimen of A. insularis from Beira, but more recent comparison 
of a specimen of insularis from Daressalaam indicates that the Beira 
specimen is referable to A. hypoxanthus Sharpe [Birds of South Africa, 
p. 205, 1875), which has erroneously been placed in the synonymy of 
insularis. Possibly all these specific forms will have to rank as subspecies 
of A . importunus, though the distribution of the forms is not continuous : 
