V °'899 VI ] Allen > Recently Described North American Birds. 34 1 



"In forty specimens examined from localities between Florida and 

 Alaska there is a regular increase in size northward. Eagles from 

 northern States are larger than those from Florida and Louisiana. In 

 addition to the other differences in size, the bill of the Alaskan bird is 

 wider, while the edging to the feathers, especially on the wing coverts, 

 is both lighter and broader. The egg of the northern bird is distinctly 

 larger, the average of sixteen specimens being 73.5 X 57.5 mm., while 

 that of forty-five Florida specimens i6 69 X 53.5 mm." 



On the ranges of the northern and southern forms of the Bald Eagle 

 see Auk, XVI, p. 109, and on the inadmissibility of H. leucocephalus 

 washingtoni, see ibid., p. 131. 



Bubo virginianus pallescens Stone. 

 Western Horned Owl. 



Bubo virginianus pallescens Stone, Am. Nat. XXXI, March, 1897, 237. 



" .... I would propose for the Horned Owl of the interior United 

 States (the subarcticus of authors, nee Hoy) the name pallescens, desig- 

 nating as the type No. 152219, Coll. U. S. Nat. Mus., J, Watson Ranch, 

 18 mi. S. W. of San Antonio, Texas. 



'• Bubo virginianus pallescens is smaller and paler than true virginia- 

 nus (the wing measuring 13.75 in.) with much less rufous admixture. 

 The barring on the belly is much finer and the feet almost pure white. 



" While not differing so much in size from B. v. facificus as indicated 

 in my former paper (Auk, 1896, p. 156), its coloration is quite distinct. 

 The latter race is darker than pallescens with more black admixture 

 above, heavier bars on the belly and with the feet more mottled with 

 rufous and brown." 



Syrnium nebulosum helveolum Bangs. 

 Texas Barred Owl. 



Syrnium nebulosum helveolum Bangs, Proc. N. Engl. Zool. Club, I, 31, 

 March 31, 1899. 



" Subspecific characters. — Size of true 6\ nebulosum ; toes naked as in 

 5. n. alleni ; colors very pallid throughout ; ground color of back, wings 

 and tail, pale yellowish brown or cinnamon, lightest on wings and tail 

 and shading on head toward sepia; all the light bars and spots on pri- 

 maries, tertials and scapulars, large and conspicuous and white; the light 

 bars on tail wider and paler than in true 6\ nebulosum ; colors below all 

 paler; dark striping and barring more cinnamomeous, less dusky, and 

 ground color paler, more whitish; feathers of tibia and tarsus, buff to 

 whitish, showing very little, or none whatever, of the dusky markings 

 present in both 5. nebulosum and 5. n. alleni. 



