158 Field Museum of Natural History — Zoology, Vol. IX. 



GROUP 4. Wing, 13 to 15 inches long. 



SECTION 1. Second primary, decidedly shorter than fourth. 



Under parts, white, barred and streaked with brown; toes, more 

 or less feathered. Strix varia. 



Barred Owl. 



See No. 176. 



SECTION 2. Second primary, about equal in length to fourth. 



Two large, ear-like tufts of feathers above the eyes. 



Bubo virginianus, and races. 

 Great Horned Owl. 

 See Nos. 181, i8ia. 



SECTION 3. Second primary, decidedly longer than fourth. 



Short-eared Owl 



Under parts, streaked; feet, thickly feathered. 



Asia flammeus. 

 Short-eared Owl. 



See No. 175. 



Under parts, white or buff white, more or less spotted; feet, nearly 

 bare; middle toe nail, with comb-like edge. Aluco pratincola. 



Barn Owl. 

 See No. 173. 



