342 Fretp Museum or Natura History — OrnitHoxocy, Vot. I. 
Similar to T. c. cinerea Vieill. (nengeta auct., nec. Linn.), but larger; 
wing longer, and upper parts and breast much clearer gray. 
Wing, 140; tail, 100; tarsus, 27 mm. 
Muscisaxicola rufivertex ruficrissa subsp. nov. 
Type from Macate, central Peru (alt. about 10,000 feet). Adult 
male, No. 49126, Field Museum of Natural History. Collected by 
M. P. Anderson, March 3, 1914. 
Similar to M. rufivertex, but crown patch more chestnut and more 
extensive, and under tail coverts tinged with pale rufous. 
Wing, 110; tail, 72; tarsus, 24; bill, 15 mm. 
A puzzling specimen from Cajamarca, Peru, approaches M. r. 
occipitalis Ridgway in coloration of tail, upper tail coverts, and paler 
crown patch, but the under tail coverts are tinged with rufous as in 
ruficrissa. 
Todirostrum cinereum ceare subsp. nov. 
Type from Serra Baturité, Ceara, Brazil. Male, No. 49127, Field 
Museum of Natural History. Collected by R. H. Becker, July 18, 
1913. 
Similar to T. c. cinereum, but smaller; wings and tail shorter, and 
bill smaller. Edgings of wing coverts and primaries white instead of 
yellow. 
Wing, 40; tail, 34; bill, 1: mm. 
It is evident that these differences are not due to immaturity, as the 
crown is entirely black (not gray on the back part as in immature birds 
of T. ¢. cinereum) and young birds of T. c. cinereum have the wing coverts 
edged with buffy. 
Myiodynastes luteiventris vicinior subsp. nov. 
Type from Yurimaguas, Peru. Male, No. 44859, Field Museum of 
Natural History. Collected by M. P. Anderson, October 4, 1912. 
Similar to M. 1. luteiventris Sclater, but smaller, and the dusky 
stripe on middle tail feathers much narrower; outer tail feathers plain 
rufous with only the shafts dark. 
Wing, 104; tail, 82; bill, 19 mm. 
The type specimen has the bases of the middle crown feathers edged 
with pale buff which may be due to immaturity. Compared with a 
series of immature M. 1. luteiventris, the same differences exist in the 
