Alseonax Cabanis, Mas. Hem., Th. i, p. .32 (18o0), Type, A. adusta (Boie). South Africa.
The genus Alseonax is very closely allied to Anthipes, but has a very small first primary. The sexes are alike and both are dull-coloured rufous or brown birds.
Oberholser, Proc. U. S. Nat. Mus., xxviii, p. 910, 1905, divides Alseonax into two genera, placing latirostris in a genus which he calls Arizelomyia. In so small a genus the division seems to be unnecessary and I retain all our Indian birds under Alseonax.
Some of the Indian species are migratory and one (latirostris) resident or only locally migratory.
Key to Species.
A. Whole upper plumage, including upper tail-
coverts, ashy-brown A. latirostris, p. 248.
B. Upper plumage olive-brown, the upper tail-
coverts chestnut-brown A. ruficaudus, p. 250.
C. Upper plumage ruddy-brown, upper tail-coverts ferruginous; tail brown, suffused
with rufous on the outer edges of the tail-feathers only…………..A. muttui, p. 251.