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



It appears most probable that all these belong to the same 

 species as the measurements are nearly alike, viz. 163 & 165 

 resp. in the old, and 165, 159 and 163 mm. resp. in the yomig. 

 The youngest one from Verdecocha agrees with regard to 

 colour and pattern most closely with the description of the 

 young bird of the main species, as set forth in Cat. Birds B. M. 

 I, p. 79. The only exception is, that there are some faint 

 transverse bars on the lower tail-coverts. The next one in 

 age is rather similar, but somewhat paler underneath, and 

 with the light bars of the upjier side still more obsolete. The 

 oldest of the young birds (7i) does not show any bars at all 

 on the back, w^hich, however, still is brownish black (not 

 slate). The lower side is very little buffish almost creamy 

 white with only few dark and incomplete cross-bars to the 

 feathers of the breast, flanks and belly, while the thighs and 

 crissum including the lower tail-coverts are unspotted. But 

 some new feathers appearing on the breast show the heavily 

 barred pattern of the adult. The same is also the case with 

 a few feathers on the outer side of the thigh. 



Parabuteo unicinctus unicinctus Tem. — 1 c^ ad. ^7io> 

 Caraburo, front öf Zambiza, 7500 f.; 1 $ -/s? above Tumbaco, 

 10000 f. 1 S ad. 175, near Zambiza 8500 i.\ I S juv. ^'j^, Cum- 

 baya, 6 miles east of Quito, same altitude; 1 (^ juv. ^74' Pichin- 

 cha, 11000 f. 



Accipiter ventralis ventralis Sclater. — 1 »c^», ^73» 1 

 unsexed, Vd 1 ? ^7iij ^ 3^^- Ve? Piganta, near Mojanda, 8500 f.; 

 1 $ juv., ^7?' ^^^^ Carapungo, 8500 f. The young birds of 

 this series show very plainly the gradual development of 

 the pattern, which consists therein, that the from the beginning 

 very pronounced brown harring of the lower side gradually 

 becomes more and more obsolete at the same time as the 

 rufous shade spreads and increases in intensity. At the same 

 time as the from the beginning few and obsolete dusky spöts 

 on the white lower tail-coverts develop into regular bars of 

 a mixed rufous and dusky. 



The size of all these five specimens is remarkably alike, 

 as the length of wing of four of them only varies between 197 

 and 200 mm., and that of the fifth (the one from Carapungo) 

 is 191 mm. 



Accipiter ventralis »nigroplumbeus » Lawr. — 1 c^ ad. Vg? 



