OF THE GAXAPAGOS ARCHIPELAGO. 495 



certain respects, especially in the relationship as to colour between young and old, 

 B. galapagensis has some affinity to this bird ; but structurally B. galapagensis is a 

 Buteo, and its divergence from the ordinary typical form is too slight to warrant 

 generic separation. 



Buteo galapagensis. 



Polyborus galapagoensis, Goiild, P. Z. S. 1837, p. 9. 



Craxirex galapagoensis, Gould; Darwin, Zool. Voy. Beagle, iii. p. 23, t. ii. ; Sol. & Salv. P. Z. S. 



1870, p. 323. 

 Buteo galapagensis, Sundev. P. Z. S. 1871, p. 125 ; Scl. & Salv. Nomencl. p. 119 ; Sharpe, Cat. Ace. 



p. 170. 

 Buteo leucops, G. R. Gray, Hand-list, i. p. 36 (descr. nulla). 



rf ad. (Abingdon Island) fuliginosus unicolor : remigum pogoniis internis grisescenti- 

 albidis fusco variegatis, fascias irregulares formantibus: cauda fuliginoso-nigra, rectri- 

 cibus mediis griseo, externis, prsecipue in pogonio interno, albido transfasciatis : tectri- 

 cibus caudse superioribus griseo et fusco transfasciatis : inferioribus rufescente tinctis : 

 iride obscure fulva, pedibus flavis: long, tota 20*0, alse 16'0, caudse 8, tarsi 2'9, rostri a 

 rictu 1'7. S mari similis sed major: long, tota 22'0, alse 17"0, caudse 9'0, tarsi 3-1. 



Jun. supra fuliginosus, fulvo variegatus, dorsi plumis ad basin albis medialiter fusco 

 transfasciatis, capitis et colli plumis ad basin albis, medialiter fulvis, fuliginoso terminatis : 

 subtus fulvus, fusco prascipue in pectore variegatus, ventre et tibiis rufescente magis 

 lavatis : alls et cauda sicut in ave adulta. 



Hab. Galapagos Islands (Darwin) ; Indefatigable and Abingdon Islands [Hahel). 



Dr. Habel gives the following remarks respecting this species, which he observed in 

 all the islands which he visited. 



" Having obtained both male and female birds in the ochre-coloured plumage with 

 dark spots, and also birds of both sexes in plumage of a uniform dusky colour, I 

 imagined that they belonged to two distinct species. I was still more confirmed in my 

 impression by the different habits observable in the two. The lighter-coloured biids 

 are very numerous and form large flocks. The birds are so tame that they carmot be 

 frightened away. If you throw a stone at one it avoids it by bending its head or lifting 

 up a leg. If hit, it flies but a short way and alights again. They are so tame that one 

 can hit them with a stick, and even catch them with the hand. When flying they only 

 rise high enough to clear the tops of the bushes and trees. The dark-coloured birds 

 are rare, and keep separate from the lighter variety, and far from human intruders. 



" I examined the stomachs of all the specimens obtained : some I found empty ; and 

 others contained insects, mostly grasshoppers. In the oesophagus of a male of the dark 

 variety I found a large 8colo]}endra, of a species common in the islands. It would 

 appear therefore that this bii'd lives chiefly on insects." — H. 



VOL. IX. — PAKT IX. May 1876. 3 x 



