384 NOKTll AMKKICAN JHUDS. 



j'i'llowisli. Hill Mai'k ; feel iiliiiiitii'diis ; iiis liii>.'lil ri'(l. First quill Ics.s lliaii half tho 

 si'ciiiiil, which alHiiil ('(|iials the Iciilh; lliiiil littlr NJioi'tcr than limilh (li>ii},'('st). 



h'viHdle. With the lilacU ii'iilaccil hy dull slate; lowcf pailf oi'hiautMiii.s-whih' iiu'dially. 

 INissihly udisliiii't s|)t'cli's (Mazatlaii)- 



(N'o. (!,81>^.) Fi't-'sh wpcciiiu'ii : Totalli'ii<,'lli, 4.7'); eximiisi' of wiiifjs, 7.1i"); \viii<;t from 

 carpal jniiit, 2.12. I'icpaivil .^ipt'ciiiicM : Tnlal li'iijrlh, 4. 10 ; win;,', 2.2"); tail, l.il"). 



\\\\\ Soutlierii bolder 111' We.'^leru Te.vas; .Ma/.allali. 



Tlu) Mack lioiid of tlii.s .spwius, as far nn known, makes it niiitnie in tlio 

 yt'iius. It is nxtriMiiclv raro, Ijiit tlirce or four spticinu-ns beinj,' known. 



We refer to tliis s])eeies a s]ieeiineii — probalily a female — obtained at 

 Afa/atlan, on the western eoast of Mexico, in April, by Colonel (Jraysun (S. 

 I., Xo. 7\'),{)\{)). This specimen dilll'rs from those from Texas in having the 

 black of the heati replaceil by a dull dark slate-color, the olive above ratlun* 

 less virescent, and the lower parts not pure while, Imt somewhat bully. A,s 

 all the other essential characters art; itleiitical, there boini,' in bolh the 

 white space coverinj,' tiie whole lore, and orbital riniii internipted on top, — 

 features not .seen in any other species, — we have little hesitation in con- 

 sidering; them the same ajjecies; which opinion is moreover strengthened by 

 the fact, that among the Texas s])ecimens, all with black caps, there are 

 no females. 



Hahits. (.)f the geneml history and habits of this rare species very little 

 is known. It was first met with by Dr. Woodhouse, on the 2()th of May, 

 18;") I, in Western Texas. This was on the IJio San I'edro, within ten miles 

 of its source. He found it among some cedars, and was attracted by its very 

 singular notes. It was in continual motion, like a Wood Warbler, and was 

 by him at first supi)ose,d to be one of those birds. He obtained two speci- 

 mens, both of which ])roved to be males. 



Mr. .lohn II. ('lark, the naturalist of the Mexican Boundary Conunission, 

 likewi.se found this s]iecies in Texas, and not far from the same locality in 

 which it was discovered i>y Dr. Woodhouse. His attention also was drawn 

 to the bird by its shrill (lis(!ordant chir]), whitdi it uttered incessantly in its 

 pursuit (jf in.sects. Thi'ee specimens only were seen, and all of them at one 

 locality, the valley of the Iiio San Pedro, to which it seemed to be confined. 

 It was not at all shy, and showed no concern when Mr. Clark ap])roaclied 

 within a few rods. Its constant motion, hopping incessantly from branch 

 to branch, made it a matter of some ditticidty to procure specimens. It 

 was found in June, and the single specimen shot by Mr. Clark was also a 

 male. 



