908 Annals of the Carnegie Museum. 



C. H. Lankester Collection: Irazu and Volcan de Turrialba. 

 Carnegie Museum: Volcan de Irazu (Carriker). Eight skins. 



The Irazu Junco, the most southern and. most aberrant member of the 

 genus, is the sole surviving form of the Boreal Life-zone in Costa Rica, 

 inhabiting the cold bleak summits of the highest volcanic peaks. It was 

 first discovered by Jose C. Zeledon on the summit of the Volcan de Irazu 

 in 1873, but the specimens collected were lost in transit to the United 

 States, together with some other rare birds collected by Senor Zeledon. 

 It was later rediscovered by Boucard in the early spring of 1877, and de- 

 scribed by him the following year. Up to 1907 it was supposed to exist 

 only on the summit of Irazu, but during that year Mr. Lankester and 

 myself took specimens on the Volcan de Turrialba, where it is very scarce, 

 owing I suppose to the fact that that volcano was in quite active eruption 

 twenty-five or thirty years ago, enough to have driven the birds from the 

 summit, where they always stay. In May, 1908, about fifteen specimens 

 were taken by Mr. Basulto on the summit of the highest peak of the Dota 

 Mountains. It is also found on the Volcan de Chiriqui in northern Chi- 

 riqui, which is the southernmost record. The bird lives in the low scrubby 

 bushes which clothe the portion of the crater above timber-line. I did 

 not find the nest, although I spent considerable time searching or it on 

 Irazu. 



745. Aimophila botterii sartorii Ridgway. 



[Peuccra] aestivalis, var. botterii (not Zonolrichia botterii Sclater) Ridgway, Am. 



Nat. VII, 1873, 616, in text, part. 

 Aimophila botterii sartorii Ridgway, Birds of North and Mid. Amer., I, 1901, 259 



(northern Nicaragua [El Volcan] ?, southern limit). 



C. H. Lankester Collection: Miravalles, one specimen. 

 Carnegie Museum: Miravalles, adult d 71 (Carriker). 



"Dr. Chas. W. Richmond very kindly compared this specimen with 

 material in the U. S. National Museum and reported that it was 'nearly 

 related to sartorii, but differed as follows: nearly like the type of sartorii 

 above, differing only (as far as I can see) in having the three innermost 

 wing-coverts without rufous edgings; underparts grayer (much less buffy), 

 chiefly on the throat, chest, sides of neck, and ear-coverts; size larger, 

 and the bill less swollen (i. e., not so wide) on the base of the upper man- 

 dible; your bird appears to be nearer the two birds mentioned by Mr. 

 Ridgway from northern Nicaragua (Bull. 50, I, 260, note 2).' We have 

 subsequently compared the bird with other specimens of sartorii from the 

 state of Vera Cruz, Mexico, and find that it is very close to that form, 



