84 



BXJLLETIN 117, UNITED STATES NATIONAL, MUSEUM. 



with the type and, what is more surprising, with an example from 

 Junin, distant 450 miles. The differences between the two forms are 

 slight, but their apparent significance and obvious bearing on the 

 origin of the life of the Titicacan Basin impels their recognition 



by name. 



Measurements. 



Place. 



Bolivia (ex Berlepsch)'. 



Puno, Titicaca ' 



La Raya ^ 



Junin 2 



Bolivia (ex Berlepsch)*. 



Puno, Titicaca ^ 



Ttica-Ttica2 



La Raya 2 



Sex. 



Male... 

 ...do... 

 ...do... 

 ...do... 

 Female 

 ...do... 

 ...do... 

 ..do... 



Wing. 



69-70 

 71 

 69 

 68 



67-68 

 67 

 61 

 64 



Tail. 



75-76 

 76 

 66 

 65 



71-73 

 68 

 60 

 60 



' Siptornis modesta sajamae. ' Siptornis modesta proxima. 



(2385) SIPTORNIS OTTONIS Berlepsch. 



Siptornis ottonis Berlepsch, Proc. Third Int. Cong., 1901, p. 197 (Cuzco, Peru). 

 Huaracondo Canyon, 1 ; Cuzco, 1 . 



(2337) SIPTORNIS GRAMINICOLA (Sclater). 



Synallaxis grominicola Sclater, Proc. Zool. Soc, 1874, p. 446, pi. 58, Sg. 2 (Junin, 

 Peru). 



More richly colored below than a specimen in worn plumage from 

 Oroya. 



Ttica-Ttica, 2. 



(2401a) SIPTORNIS URUBAMBENSIS Chapman. 



Siptornis iiruhambensis Chapman, Bull. Amer. Mus. Nat. Hist., vol. 41, 1919, 

 p. 328 (above Machu Picchu (14,000 feet), Peru). 



Specific characters. — Size of Siptornis flammulata to which it bears 

 a general resemblance in the color of the underparts, but upperparts 

 Prout's brown, the streaks obscure ochraceous-buff and extending 

 little, if any, posterior to the nape; tail uniform, of about the same 

 color as the back, without rufous. 



Inhabits the Temperate Zone. 



Above Machu Picchu, 14,000 feet, 2; 12,000 feet, 3. 



(2409) PSEUDOCOLAPTES BOISSONNEAUTI AURITUS (Tschudi). 



Anahrdes auritus Tschudi, Arch, fiir Naturg., 1844, p. 204 (Peni). 



Distinguished from Colombian and Ecuadorian examples chiefly 

 by its yollow-tinged throat and cheek-tufts. Inhabits the Sub- 

 tropical Zone. 



Torontoy, 3. 



