120 PARUS p. ATRICAPILLUS SEPTENTRIONALIS 



Plumage lax, without decided changes with age or season. 

 Size medium. Nest excavated. Eggs spotted. 

 This genus has developed a greater number of species than 



Fig. OO. — A typical Parus {P. atricapillus). 



any other of the family, and may be considered in one] sense 

 the typical expression of the whole parine group. There are 

 five or six American species, two of which, perfectly distinct' 

 from each other, inhabit the Colorado Basin. 



T.<oiig-taile€l Cliickadee 



Parus atricapillus septentrlonalis 



Parus atricapillus, in part, of some authors.— iV/axm. J. f. O. vi. 1858, 119. 



Parus septeiltriunalis, Harris, Pr. Phila. Acad. ii. 1845, 300 (Upper Missouri River). — Brf. 



Stansb. Rep. GSL. 1852, 316— Cass. 111. 1853, 17, 80, pi. \A. — Bd. BNA. 18.58, 389.— Sc/. 



Cat. AB. 1861, U.—Hayd. Tr. Am. Philos. Soc. xii. 1862, 16i.—B/ak. IbiS, iv. 1862, 5 



(Saskatchewan).- Biai. Ibis, v. 1863, 67 (British America).— B(i, Rev. 1864, 19.—{>.)Hoy, 



Smiths. Rep. for 1864, 1865, 438 (Missouri).— Coo;;. Am. Nat. iii. 186!), lA.—Oovis, Am. 



Nat. V. 1871, 369.— .«<£». U. S. Geol. Surv. Terr, for 1870, 1871, A&i.— Aiken, Pr. Bost. 



Soc. xvi. 1872, 195 (Colorado).— M«rr. U. S. Geol. Surv. Terr, for 1872, 1873, 713. 

 Lopbophanes septenrionalis, Bd. Stansb. Rep. GSL. 1852, 332. 

 Parus atricapiUus var. septentriOIialiS, AH'r, Bull. MCZ. iii. 1872, 174. — Co;/<>s, Key, 1872, 



S\.— Allen, Am. Nat. vi. 1872, 396.— flWo'. Bull. Ess. lust. v. 1873, 179.— Co!/,es, BNW. 



1874, 21, '^iO.— Allen, Pr. Bo.st. Soc. xvii. 1874, 49. — /?. B. (f R. NAB. i. 1874, 99, pi. 7. f. 



2.—rarr. tC Eensn. Rep. Orn. Specs. 1874, l.—Hensli. Rep. Orn. Specs. 1874, 41, 72.— 



Allen, Pr. Bost. Soc. xvii. 1874, i9.—Nels. Pr. Bost. Soc. xvii. 1875, 339 (Utah).— Hc«.»A. 



Zool. Bxpl. W. 100 Merid. 1876, 171. 

 Parus septeiltriOlialis var. albescens, Bd. BNA. 1858, p. xxxvii.— (7o"/^ Xm. Nat. iii. 1869,299. 

 Parus albescens. Coop. Am. Nat. iii. 1869, 74. 



Hab. — Region of the Missouri to the Rocky Mountaius and south in Alpine 

 districts to. New Mexico. 



Ch. sp. — $ 9 Dorso ochraceoclncreo^gastra'o ochraceo-alho; alls 

 ccmdaqiiefuscis, late albo-limhatis; laterihiis capit'iH et colli nireis,. 

 vertice, nucha galdque nigris. Cauda alls longiore. 



$ 9 : Dorsal region ashy, with an ochraceons tinge, especially on the rump ; 

 under parts white, with an ochraceons tinge. Wings and tail fiLscons, yery 



