41 [ Vol. xxxix. 
Mr. Cnaruzs Cuvss sent descriptions of the following new 
forms of South and Central American birds :— 
Sclerurus mexicanus certus, subsp. nov. 
Adult. Differs from the type of S. m. mexicanus in being 
paler brown on the crown of the head, nape, and back, the 
rump and upper tail-coverts paler and brighter chestnut, and 
the rufous on the throat and breast much brighter, the 
abdomen and under tail-coverts rufous brown, and the 
axillaries and under wing-coverts paler rufous. 
Total length 172 mm., exposed culmen 20, wing 83, 
tail 61, tarsus 21. 
Habitat. Guatemala. 
The type, which is in the British Museum, was collected 
by the late Osbert Salvin at Volean de Agua, aboye San 
Diego, Guatemala—Salvin-Godman Collection. 
Sclerurus mexicanus macconnelli, subsp. nov. 
Adult male. Differs from S.m. mexicanus in being paler 
and more olive-brown on the top of the head and back, paler 
also on the throat and upper breast, to which the rufous is 
restricted, the lower breast, abdomen, and under tail-caverts 
darker and more dusky, and in the smaller wing- and tail- 
measurements. Total length 163 mm., exposed eulmen 20, 
wing 78, tail 58, tarsus 20. 
Habitat. British Guiana. 
The type, which is in the McConnell collection, was 
collected on the Ituribisi River in February 1907. 
. 
Sclerurus mexicanus peruvianus, subsp. nov. 
Adult female. Differs from S. m. mexicanus in being 
darker on the crown of the head and back, especially on the 
rump and upper tail-coverts, which are almost uniform with 
the back; the rufous on the under surface is restricted 
to the throat, the breast uniform with the abdomen and 
under tail-coverts. 
Total length 162 mm., exposed culmen 22, wing 81, 
- tail 58, tarsus 22. 
