Vol. XXX1X, | 42 
Habitat. East Peru. . 
~The type, which is. in | the Bava REuseun was 5 colleeeea 
by E. Bartlett at a ee East Peru, on the 19th of 
March, 1866. 
‘Sclerurus mexicanus bahie, subsp. nov. 
Adult. Differs from S. m. mexicanus in being chogalae 
brown on the crown of the head, back, and wings, the ramp 
and upper tail-coverts dark rufous brown, but not con-_ 
trasting so vividly with the back as in the typical bird, 
darker on the under surface; the rufous restricted to the 
throat and foreneck, and the breast, abdomen, and under. 
tail-coverts uniform dark chocolate-brown. 
Total length 178 mm., exposed culmen 21, wing 82, 
tail 62, tarsus 26. 
- Habitat. Bahia, Kast Brazil. 
The type is in the British Museum. 
Poliolzma, gen. nov. 
This genus 1s s readily distinguished in having the ieee 
uniform with the rest of the under surface. ‘The bill, which 
is long compared with the other genera of this group, has the 
exposed culmen about equal in length to that of the hind toe 
and claw. The wing is rounded; the third, fourth, and fifth 
primary-quills longest, the second about equal to the seventh. | 
The tail is short and nearly square, the outer feather on each 
side being very slightly shorter than the rest. The feet are 
small and weak. Male and female entirely different in colour. 
1 propose, therefore, that this group be separated from the 
genus Myrmotherula, with which they have been hitherto 
associated under the name Loliolema. Type P. cinerei- 
ventris (Sel. & Saly.), and the following species included :-— 
P. hauxwelli (Scl.), P. guttata (Vieill.), P. assimilis (Pelz.)ee 
P. hellmayri (Snethl.), P. berlepschi (Hellm.). 
The genus Manikup Desmarest, Hist. Nat. Tanagers, 
Manakins et Todies, pl. Ixvi. 1805, founded on M. albifrons . 
(Linn.), has priority over Pithys Vieillot, 1816, and must 
be used. 
