[Auk 

 July 



them to seek other shelter. Their food in winter seems to consist chiefly 

 of the berries of the wild rose. 



40. Centrocercus urophasianus. — Common. Different coveys were 

 found mixed when the young were two-thirds grown. In April, 1S91, I 

 watched two pairs for some time at a short distance from me. The males 

 had their air-sacks inflated and feathers ruffled, showing more white than 

 would seem possible, and looking very large. They spread their tails, 

 dragged their wings and "strutted very much as a domestic Turkey 

 Gobbler does. Their peculiar tail gave the performance a ridiculous 

 appearance. Capt. Bendire, U. S. A., writes me that he once observed 

 similar actions. 



41. Zenaida macroura. — Common. Have known two broods to be 

 hatched in one nest during the season. 



42. Cathartes aura.— Rare. Twelve seen in June, 1SS9. 



43. Circus hudsonius. — Common. Breeds. 



44. Buteo swainsoni. — Rare. Have seen only two that I am certain of. 



45. Aquila chrysaetos. — Rare. One, apparently two years old, seen in 

 December, 1889. Two young were taken in the Bad Lands in 18S9. One 

 of these was kept in a cage at the Fort for about a year. 



46. Falco richardsonii. — Rare. Two taken in the fall of 1SS9. 



47. Falco sparverius. — Common. Breeds. I have never been in a 

 country where Hawks are as scarce as they are here. 



48. Asio wilsonianus.^Rare. Three seen. 



49. Asio accipitrinus. — Rare. Two seen. 



^o. Megascops asio ? — Rare. Three seen. None taken. 



1^1. Bubo virginianus subarcticus. — Common. Some breed. 



1^2. Nyctea nyctea. — Usually rare. In the winter of 1SS9-90 eighteen 

 were seen or reliably reported. They seemed to come in advance of the 

 intense cold that set in December 31, 1889, and lasted twenty-four days. 

 The last was seen February 4, 1890. The Cheyenne Indians say none had 

 been seen since " The-bad-cow-year " (winter of 1886-S7). They call it 

 " Wo-com-mis-ta" (Owl white). I also saw one in the wint3r of 1890-91 

 and heard of four more. All I examined were fat. None attempted to 

 alight on trees. 



53. Speotyto cunicularia hypogaea. — Common, but scarcer than usual 

 at other localities when they are found. There are large old prairie dog 

 towns but very few prairie dogs. 



154. Coccyzus erythrophthalmus. — Rare. One female taken June 27, 

 1889. The largest ova were of the size of BB shot. One male taken 

 July 24, 1889. 



155. Ceryle alcyon. — -Common. Not seen on this part of the Yellow- 

 stone, owing probably to the color of the water, but found on upper 

 Tongue River and Lame Deer Creek. 



i;6. Dryobates villosus leucomelas ? — Rare. 



c;7. Dryobates pubescens. — -Rather common. About as many in 

 winter as in summer. Think it breeds. 



