342 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I. 



Similar to T. c. cinerea Vieill. (nengeta auct., nee. Linn.), but larger; 

 wing longer, and upper parts and breast much clearer gray. 

 Wing, 140; tail, 100; tarsus, 27 mm. 



Muscisaxicola ruf ivertex 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, no; 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 cearae subsp. nov. 



Type from Serra Baturit^, Ceara, Brazil. Male, No. 49127, Field 

 Museum of Natural History. Collected by R. H. Becker, July 18, 



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, n 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. c. 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. I. 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. I. luteiventris, the same differences exist in the 



