244 



IT. S P R, K. EXP AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



In this species the wings are nhoit and broad ; the tcrtials in the closed wing longer than 

 the secondaries, and about .45 of an inch shorter than the i>riinaries ; the wing considerably 

 rounded, the first quill intermediate between the fourth and fifth, the second longest. The tail 

 is moderately graduated, the lateral leathers .15 of an inch shorter than the middle one. 



It is quite possible that in the full plumaged male the entire throat may be black, as there 

 is a tendency to this in some specimens. A fall male (1697) shows the black only on the fore 

 breast. 



Authors describe the black feathers of the throat as crenulated (margined) with white. 1 

 have never seen any specimens (out of about twenty) in which these margins were other than 

 ash color. 



The mourning warbler is very similar to the Oporornis cujilis, and is only to be distinguished by 

 the smaller size, much shorter, and more rounded wings, longer legs, and shorter toes, and other 

 generic characters. The adult males are easily separated by the decided black of the throat 

 and absence of white ring round the eye in G. 'pliiladelphia. The females are much more closely 

 related, both having the pale ring round the eye. The longer and more pointed wings of 

 CHjilis will distinguish them ; the relations to G. luacgillivrayi will be pointed out under that 

 species. 



A female (2906) has a strong tinge of bufi" yellow on the throat. 



List of specimens. 



Locality. 



Carlisle, Fa. 



-do- 

 .do. 



.do. 



..do.. 

 ..do.. 

 ..do.. 



South Illinois 



Independence, Mo . 



When collected. 



May 26, 1844 

 Sept. 6, 1844 

 Sept. 24, 1843 

 May 26, 1843 

 May 30, 1843 

 May 17, 1845 

 May 28, 1841 

 May 11, 1841 



Whence obtained. 



S. F. Baird 

 , do... 



.do. 



.do- 



.do. 

 .do. 



.do. 



K. Keunicott. 

 Dr. Cooper 



Oris. 

 No. 



45 



Length. 



Stretch 

 of wiiiss. 



5.50 

 5.75 

 5.33 

 5.25 

 6.33 

 5. 16 

 8.41 



.00 



7.75 

 8.00 

 8.16 

 7.75 

 7.06 

 7.75 

 7.66 



Ci. 00 



Wing. 



2.41 

 2.50 

 2.58 

 2.41 

 2.16 

 2.41 



Remarks. 



2. 50 



Iris and bill brown, 

 feet pale brown.. 



GEOTHLYPIS MACGILLIVRAYI, Baird. 



MacRillivray's Warbler. 



Sylvia macgillirrayi, AunuuuN, Orn. niog. V, 1839, 75 ; pi. 399. {Sylvia jikilaiklfhiu un plate.) 



7Vic/in.5 nmi-ffiHifrat/i, Ai'D. Syii. 1K)9, G4.— In. Birds Anier. II, 1H41, 74 ; pi. 100. 



Sylvia Inlmioci, Townsend, J. A. N. Se. VIII, 18.39, 149, 159. (Read April, but tlic volimic really not pubiidliril 



till 1840.) 

 Sylvia lolmin, Townseno, Narrative, 1839, .343. 

 Trichas tolmiad, Nuttali., Man. I, 2d cd., 1840, 4C0. 



Sr. On.— Head anil neck all round, throat and fore part of the breast dark ash color ; a narrow frontlet, loral region and space 

 round the eye (scarcely complete behind) black. The eyelids above and below the eye (not in a continuous ring) white. The 

 feathers of the chin, throat, and fore breast really black, with ashy gray tips, more or leas concealing tlie black. Rest of ui>pcr 

 parts dark olive green, (sides under the wings paler ;) of lower, bright yellow. Female with the throat paler and without any 

 black. Length of male, 5 inches ; wing, 12.45 ; tail, 2.45. 



//a/-.— I'aeific coast of North Anioriea, soulh to Gidf of CalilUrnia and across to Monterey, Me.\ico. In Rocky nioiinlains to 

 Fort Laramie f (Ur. Cooper.) 



