STRIGES. 45 



and S. leptogrammicum. This Owl was brought under 

 my father's notice by Count Salvadori in February 1887, 

 and in May described in ' Annali del Museo Civico di Storia 

 Naturale di Genova/ iv. p. 15. 



Micropallas graysoni, Ridgway : Socorro, Mexico. — Like 

 M. whitneyi, but browner. 



Heteroglaux bkwitti, Hume: Central India. — "General 

 appearance not unlike Athene brama " (Stray Feathers, i. 

 p. 468), to which genus Mr. Blanford thinks it belongs. 



Spiloglaux rosseliana (Tristram) : Rossel Island, New 

 Guinea. — "Nearest to the Australian Ni/wx boobook, though 

 very much smaller" (Ibis, 188'J, p. 557). 



Hieraglaux natalis (Lister) : Christmas Island, in the 

 Australian ocean. — P. Z. S. 1888, p. 525. {C Only specimen 

 [obtained] in the British Museum. Comes nearest to 

 Nino.vforbesi."—J. H. G., MS. 



Hieraglaux granti (Sha^pe) : Solomou Islands.— P. Z. S. 

 1888. p. 183. Comes nearest to H. punctulata. 



Strix sororcvla, Sclater : Timor Laut. — "Examined at 

 Brit. Mus., July 1884. Very small and quite distinct : in 

 tints of plumage resembling S. novce-liolhmd'ue (see Salva- 

 dori, 'Aggiunte alia Ornitologia della Pap./ 1889, p. 25)."— 

 J. H.G., MS. 



Subjoined is the celebrated Nitzsch's classification of Owls, 

 based on the feather-tracts, accurately transcribed by a kind 

 friend, and which is to be found in much fuller detail in the 

 translation of his ' Pterylography,' edited by Mr. Sclater, 

 pp. 67-71 and plate ii : — 



I. Owls with the outer branch of the inferior tract free 

 posteriorly. 



A. With scapular portion of spinal tract forming a deeply 

 divided fork. 



a. With ear-tufts. 



1. Bubo. 



2. Orus. 



3. Scops. 



b. Without ear-tufts. 



(Tawnt Owl, Ural Owl, Lait Owl, Snowy Owl.) 



