DICRURUS WALDENI 171 
Dicrurus waldeni. 
Dicrurus waldeni, Schl. Ned. Tijdschr. Dierk. iii. p. 86 (1866) Mayotte Isl. ; 
id. P. Z. §. 1866, p. 423; id. and Poll. Faun. Madag. Ois. p. 80, pl. 
23 (1868); Hartl. Vog. Madag. p. 150 (1877); Shelley, B. Afr. i. 
No. 645 (1896) ; id. Ibis, 1901, p. 590. 
Buachanga waldeni, Sharpe, Cat. B. M. iii. p. 253 (1877). 
Buchanga atra var. waldeni, Milne Edw. and Oust. N. Arch. Mus. Hist. 
Nat. Paris (2), x. p. 257 (1888) Mayotte Isl. 
Subspecies a. D. fuscipennis. 
Buchanga atra var. Milne Edw. and Oust. C. R. Ac. Se. ci. p. 221 (1885) 
Great Comoro Isl. 
Buchanga atra var. fuscipennis, Milne Edw. and Oust. Ann. Se. Nat. 
Zool. (7) ii. p. 225 (1887), Great Comoro Isl. 
Dicrurus fuscipennis, Shelley, Ibis, 1901, p. 590. 
Type of D. waldeni. Black, glossed all over with bluish green. Iris red; 
bill and feet black. Total length 12-6 inches, culmen 1:2, wing 5:6, tail 7:6 
(depth of fork 2.5), tarsus 1:0. Mayotte Island. 
D. fuscipennis. Similar to the last, but with the quills and tail browner. 
Wing 58, tail 5:6, tarsus 0:96. Great Comoro Island. 
Walden’s Drongo inhabits the island of Mayotte, and to 
this form probably belongs the Great Comoro Island bird. 
I here treat these as subspecies owing to the lack of 
‘evidence to the contrary ; but the characters for their separa- 
tion appear to me to be of doubtful value, possibly due to 
the season and age of the type specimens when they were 
procured. 
D. waldeni was discovered by Pollen on Mayotte, where he 
considered it to be scarce and shy, frequenting in parties of 
three or four the tops of the trees and feeding on beetles. The 
song, he observes, is melodious with an organ-like tone. 
Milne Edwards and Oustalet compare their D. fuscipennis 
with the common Indian Drongo, from which it differs in its 
larger size (wing 5‘8), and resembles in this respect D. waldent. 
I much doubt the browner shade of the quills and tail being 
a constant character for its distinction from the latter species. 
