from the Colony of Natal. 



151 



cross-bands of brownish black, the terminal baud broader and 

 margined with whitish. 



Below, ochraceous white, purer on the lower belly and crissum ; 

 breast, flanks, and under wing-coverts marked with elongated 

 shaft-spots of chocolate-brown, which are widest on the flank and 

 under wing-coverts; the crissum marked with rounded shaft- 

 spots rather paler in colour, and in many cases repeated on the 

 same feather ; thighs nearly uniform ochraceous ; axillaries like 

 the breast, rather more rufous in colour, and distinctly marked 

 with narrow elongated shaft-spots ; under surface of primaries 

 at the base whitish, varied with grey on the inner webs ; under 

 surface of tail greyish-white barred, in correspondence with the 

 upper surface. 



The measurements of Spizaetus ayresii, in inches and tenths, 

 are as follows, the corresponding dimensions of two examples of 

 Spizaetus zonurus being given for comparison. 



Spiz. ayresii {S) 



zonurus * ( c? ) («) 



(?)(*) 



Long, 

 tota. 



19-0 



17-0 

 220 



Alae. 



16-0 

 13-0 

 160 



Caudae. 



90 



7-0 

 10-0 



Rostri 

 a rictu. 



1-4 



Tarsi, 



2-7 

 4-0 



Dig. 



med. 



cum 



ungue. 



3-2 

 3 



Dig. 



ext. 



cum 



ungue. 



2-4 



Dig. 



int. 



cum 



ungue. 



26 



2-0 2-4 



Dig. 

 post, 

 cum 



3-0 

 2-4 



—J. H. G.] 



178. MoTACiLLA LONGiCAUDA (RUpp.). Loug-tailcd Wagtail. 



Male and female. Iris brown ; bill black ; tarsi and feet dark 

 ash-colour. 



These Wagtails are particularly graceful in their movements. 

 They frequent rocky streams, and go so close to the rushing 

 water that one expects to see them washed away every instant. 

 They appear to glide rather than to walk or run over the stones 

 in search of insects, and are not at all afraid of wetting their feet. 



Soft small dragon-flies are favourite food with them. They 

 are generally seen in pairs, and warble very prettily, though not 

 loudly. 



* [Specimen («) of Spizaetus zonurus is from Galam, and is now in the 

 Derby Museum at Liverpool. Specimen {b) is in the South-African Museum 

 at Cape Town, near which city it was procured. — J. H. G.] 



