. [MElilCAX GREA T HORNED WLS—OBERHOL.SER. 1 9 1 



ASIO MAGELLANICUS OCCIDENTALIS (Stone). 

 Bubo lirffiniamis oc('i(le)dalw iiTO^K, Auk, XJIJ, 1896, j). 155. 



Chars, subsp. — hike Asia inageUanicus paUesceius, but consideni))ly 

 larger; colors averaging" darker. 



Ty2>e locality. — Mitchell County, Iowa (winter). 



Geo(/rap/tical (list r/ljaf ion. -Westarn United States, from Minnesota 

 and Kansas to Nevada, southeastern Oregon, Utah, and Montana; 

 south in winter to Iowa. 



3Ieasiire///e?it.s {10 males). — Wing, 333-3(55 (avei'agc, 34U.6) mm.; 

 tail, 200-225 (average, 212.8) nun.; exposed culmen, 35-40 (average, 

 37.(5) mm.; culmen without cere, 26-2S (average, 27.1) mm. {9 

 females.) — Wing, 360-390 (average, 37(J.l) nmi. ; tail, 220-2-lU (aver- 

 age, 230.5) mm. ; exposed culmen, 37-i3 (average, 40.7) mm.; culmen 

 Avithout cere, 28-33 (average. 30.2) nun. 



Although hitherto not recognized, this form is a fairh* well-marked 

 one, and covering, as it does, an extensive area, is well worth}- a name. 

 Colorado and Nevada specimens are somewhat darker than those from 

 Montana and the Dakotas. In Colorado, and doubtless in other local- 

 ities also, occidentalis has a dark phase, characterized by great increase 

 of blackish both above and below. 



Specimens of this race examined come from the following places: 



Coloradu. — Elk Mountains; Routt County; Pueblo County; Twin 

 Lakes; Cache laPoudre River. 



Lnoa. — Mitchell County; Grinnell. 



KansoM. — Pendennis, 



Montana. — St. Mar3\s Lake; Fort Custer; Fort Shaw. 



Minnesota. — Aitkin; Elk River; Excelsior. 



Nevada. — Austin (35 miles southwest). 



N(Mh Dal'ota. — Missouri River, 87 miles below Fort Union; Devils 

 Lake. 



Oregon.— FvmeYiWe. 



Wyoming. — Fort Bridger; Deer Creek; West Fork of iNledicine 

 Bow Creek. 



ASIO MAGELLANICUS WAPACUTHU (Gmelin). 



Strix wapacutku G'HTe.i.i^, Syst. Nat., I, 1788, p. 291. 



Bubo arcticus Swaixsox, Faun. Bor.-Amer., II, 1832, j). 86, pi. xxx. 



Bubo subardlcuti Hoy, Proc. Acad. Nat. Sci. Phila., VI, 1852, p. 211. 



Chars, suhsj). — Similar to Asio viagellanicus occidentalis., but paler, 

 the upper parts with lighter ochraceous, less black, and more white, 

 tiu' lower surface more Avhitish, les.s heavily barred, the feet with less 

 mottling and less ochraceous — usually innnaculate. 



2yj^e locality. — Hudson Ba}', Canada. 



Geographical distrihution. — Northern Canada, from Hudson Bay 

 to the Valley of the ^lackeiizie River; south in winter to the northern 

 United States, from Idaho to Wisconsin. 



