40 ARKIV FÖR ZOOLOGI. BAND 14. N:0 25. 



tail-coverts similar with regard to the ground colour, but 

 showing in a striking manner the characteristic pattern with 

 the white oval spöts arranged in pairs. Axillaries and under 

 wing-coverts have the same pattern as well. 



The three outer primaries are notched on the inner web, 

 and in the more spotted of the two specimens the same may 

 be said about the fourth as well, but in the darker specimen 

 the fourth is only sinuate. 



Length of wing in the male 373 mm. in the unsexed spe- 

 cimen 397 mm. (when adpressed). Culmen from cere 21,5 

 and 24 mm. resp. 



Buteo poecilochrous Gurney. — 1 »c^» ^^^^ & 1 $ ^7^, both 

 adult and collected on Pichincha at an altitude of 12 and 14 

 thousand feet agree completely with Gurney 's description 

 although the former is a little less barred. 



1 (^ from nearly the same locality, collected ^7i is similar 

 to the former on the upper side but pure white below, only 

 with some faint traces of dusky undulations, which hardly 

 are discernible even at a short distance. We think it worth 

 mentioning that the red of the interscapular region is just as 

 well developed in this male as in the female, because this does 

 not appear to be known, and this species differs by this from 

 B, erythronotus which it otherwise resembles in pattern. In 

 addition to these old birds there is a number of young birds 

 which we refer to this species viz.: 1 (^ juv. ^7^, Pichincha 

 12000 f.; 1 $ juv. ^Va, 1 S juv. ^7^^, Chaupicruz, 9400 f.; 1 c^ 

 juv. Vio, Chilogallo, 9800 f.; 1 c^ juv. 27^ near Cotocallo, 9400 

 f.; 1 ^ juv. Tumbaco, 8000 f. 



The length of the wing of these specimens is resp. in the 

 same order as quoted above: the old birds: 455, 455, 465; 

 the young birds: 450, 480, 462, 495, 485, 470 mm. 



Buteo swainsoni Bp. — 1 ? ^^j^ 1916, Zambiza, 6 miles 

 north of Quito, 7500 f. altitude. 



Buteo platypterus Vieill. — 1 (^ ad. ^y,^, Pichincha 12 — 

 13000 f.; 1 c^ \'^, 1 S '7i2, Quito 9600 L; I ^ ad. 73 road to 

 Mindo, 9000 f.; 2 c^ juv. 73 below Mindo 5000 f.; 1 (^ juv. ^^/^^, 

 1 ? ad. 17^, 1 ? ad. le? juv., 1 ? juv. '^^ 1 $ ad. ^7, at 

 Gualea 5—6000 f.; 1 unsexed ^/„ 1 c^ juv. ^'j^^, Zambiza, 7 

 miles north-east of Quito 7500—8500 f.; 1 ? juv. 73, Alon- 

 guinche south-east of Mojanda 9000 f.; 1 ? juv. ^y^, northern 



