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



cream color with only a faint trace of ashy on sides of the breast; outer 

 wing coverts broadly edged with white; white end of third outer tail 

 feather more extensive. 



Wing, 52; tail, 53; bill, 10 mm. 



Cistothorus platensis tamas subsp. nov, 



Type from Paramo de Tama (head waters of the Tachira River), 

 Venezuela. Adult male, No. 44860, Field Museum of Natural History. 

 Collected by W. H. Osgood and S. G. Jewett, March i, 1911. 



General coloration more rufous brown than either C. p. mquatorialis, 

 meridcs, or apolinari, and decidedly smaller than the last; crown brown 

 with only a slight tinge of rufous and obscurely streaked with dusky. 

 Coloration of upper parts approaching cequatoriatis, but pale streaks on 

 the back more buffy; under parts much darker rufous brown, with only 

 a slight indication of whitish on the middle of belly and throat; rump 

 plain. 



Wing, 48; tail, 47; bill, 12 mm. 



Five males and one female examined from the type locality. 



Troglodytes musculus beckeri subsp. nov. 



Type from Serra Baturit^, Ceara, Brazil. Adult male, No. 49115, 

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

 14, 1913. 



Similar to T. m. musculus, but differs in having the under parts paler 

 and more buffy rufous; under tail coverts clear ochraceous rufous with- 

 out spots or bars; crown and back paler and more grayish than in mus- 

 culus and the upper tail coverts brighter rufous. From T. m. clarus it 

 may be at once distinguished by its brighter rufous upper tail coverts 

 and more rufous and unmarked under tail coverts, more grayish tinged 

 back and the pronounced rufous buff coloration of the sides of the body. 



Wing, 52; tail, 43; bill, 13 mm. 



Planesticus rut iventer juensis subsp. nov. 



Type from Jua, near Iguatu, Ceara, Brazil. Adult male, No. 49114, 

 Field Museum of Natural History. Collected by R. H. Becker, August 



Similar to P. r. rufiventer from Minas Geraes and Rio de Janeiro, but 

 differs in having the upper parts decidedly more grayish olive and the 

 belly and flanks paler and more ochraceous rufous. 



Wing, 124; tail, 114; bill, 20; tarsus, 33 mm. 



Eight specimens examined from the type locality. 



