102 COLLURIO BOREALIS, GREAT NORTHERN SHRIKE. 



B. L. I. 1844, 155.— Gray, Gen. of Birds, 1847, 204.— Cass., Pr. Phila. Acad, 1857, 

 212. — Maxim., J. f. <). vi, 1858, 190 (Upper Missouri).— Jones, Nat. iu Burimula, 

 1857, 51.— DurssKR & Siiai!I>k, P. Z. S. 187(1. r>'.)l.— Trnxr,., B. E. Pa. 18(59, 19.— 

 Fixscii, Abh. Nat. 1872, 39 (Alaska).— Tuiri'E, Pi-. Ess. Inst, vi, 1871, 117. 



Colhjrio boreolis, Bd., B. N. A. 1858, 324.— Coop. & Suck., N. H. Wash. Ter. 1859, 188.— 

 COUES & Prext., Smiths. Rep. for 18G1 (18G2), 409.— Ha yd.. Rep. 1862, 162.— ' 

 CoUES, Pr. Pliila. Acad. 1866, 73.— Lord, Nat. Vane, ii, 1866, 295. — Cooi'., Am. 

 Nat. iii, 1889, 35.— Dale & Banx., Tr. Cliic. Acad, i, 18G9, 280.— Stkv., U. S. 

 Geol. Siirv. Ter. 1870, 464.— Merr., ibid. 1872, 677. 



CoUnrio horailis, Bd., Rev. 1866, 440.— Coues, Pr. Es. Inst, v, 1868, 277.— Coop., B. Cal. 

 i, 137.— AiKEX, Pr. Bost. Soc. 1872, 198 (Colorado).— CouES, Key, 1872, 125, lig. 

 73.— Meim!., U. S. Geol. Surv. Ter. 1872, 677. -B. B. & R., N. A. B. i, 1874, 415. 



Lcunus sqitentrioinilis, Bp., Syu. 1828, 72; P. Z. S. 1837, 112; Cousp. i, 1850, 363; R. & 

 M. Z. 1853, 294.— Cass., Pr. Phila. Acad. 1857, 213.— Murray, Ediub. N. Phil. 

 Journ. xi, 1859, 223. 



Colhjrio ckcmumji'mis, Gregg, Pr. Elmira Acad, i, 1870 (p. 9 of reprinted list). (Young). 



Hah. — North America. In wintei-, south to about 35°. Alleghanies, breeding {Turn- 

 hull). Bermuda {Jones). 



Lieuienanl TVarreii^s Expedition. — 4552, Fort Pierre. 



Later Expeditions. — 60996-98, Rock Creek and Green River, Wyoming; 62270, Idaho. 



Not obtained by Captain Rayuolds' Expedition. 



The Shrike appears to be common on the Upper Missouri in winter ; 

 I have several times seen it at that season about Fort Eandall. 1 have 

 also happened to meet with it twice in widely separated localities, but 

 m each instance at about the extreme southeru limit, viz., at Washing- 

 ton, D. C, and at Fort Whipple, Arizona. The only record of its breed- 

 ing- in the United States that 1 have found, is Mr. Turnbull's statement, 

 that "mauj- nestle on the mountain ridges of the Alleghanies." 



Mr. Trippe informs me that the Butcher-bird is "quite common in Col- 

 orado, in October, about the 3Iiddle Park, and duriug the wiuter along 

 tlie edge of the i)lains. Late in November one was observed at I<]aho 

 S[)riugs to catch aud kill a Snow-bird, and carry it off in its bill up the 

 side of a mountain." 



The eggs of our two species of Shrike are indistinguishable, though 

 those of borcalis average a trifle the largest — about 1.10 by 0.80. The 

 ground is dull w hite, blotched or freckled all over with a peculiar shade 

 of dull grayish-brown, in some instances deepening into grayish-choco- 

 late. The variations iu precise amount of spotting, as well as in size 

 and shade of the markings, is interminable. 



COLLUKIO LUDOVICIANUS var. EXCUBITOEOIDES, (Sw.) Coues. 



White-rumped Shrike* 



b. excuMtoroides. 



Laniits excitUtoroides, Sw., F. B. A. ii, 1831, 115, pi. 35. — Game., Pr. Phila. Acad. 1847, 

 200.— Cass., ihid. 1857, 213.— Woodh., Sitgr. Rep. 1853, 77 (Texas).— Heerm., 

 P. R. R. Rep. X, 1859, 55.— Sol., P. Z. S. 1864, 173 (city of ilexico).— Dress. & 

 Sharpe, p. Z. S. 1870, 595. 



Colhjrio excuhitoroides, Bd., B. N. A. 1858, 527, pi. 75, f. 2.— Kexx., P. R. R. Rep. x, 1859, 

 25.— Hayd., Rep. 1862, 162.— Coues, Pr. Phila. Acad. 1866, 73 (Arizona).— 

 McIewr., Pr. Ess. Inst, v, 1866, 87 (Hamilton, C. W.).— Coop., Am. Nat. Aug. 

 1869, 34 (Fort Union, breeding; eggs six). — Coop., Pr. Cal. Acad. 1870, 75. 



Collurio exeubiioroides, B]>., Rev. 1866, 445. — Coues, Pr. Ess. Inst, v, 1868, 277. — AlleN", 

 Mem. Bost. Soc. i, 1869, 504, 517 (Illinois). — SuMicii., Mem. Bost. Soc. N. H. i, 

 1869, 548 (Vera Cruz).— Coop., B. Cal. i, 1871, 138.— Aiken, Pr. Bost. Soc. 

 1872, 198 (Colorado). 



Collurio Indorieianus var. exeuhiioroides, Coues, Key, 1872, 125. — B. B. & R., N. A. B. 

 1874, 421. 



Lanius ludovicianus, Maxim., J. f. O. 1858, 191 (Upper Missouri). 



Collurio hidoricianns, Ali.ex, Mem. Bost. Soc. i, 1868, 499 (Iowa).— Allex, Am. Nat. 1869, 

 579 (refers to Canadian and New York examples). — Ar.EEX, Bull. M. C. Z. iii. 

 1872, 176 (Kansas; Colorado, Utah). — (?)Purdie, Am. Nat. vii, 1873, 115 (Mass.)! 



