240 



U. S. p. R R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



rump, upper tail coverts, wings, and tail above, bluish ash color. Inner margin of quills and the tail feathers (except the 

 innermost) white, the outer webs and tips like the back. Length, 5.40 ; wing, 2.90 ; tail, 2.25. 



Hub. — South Atlantic and Gulf Stales to mouth of Ohio north, and the Misorui river west. West Indies. 



The wings are long and jjointed ; the first quill longest; the tail is moderately rounded. 

 The outer primary and alula are also edged with white. 



The female has the yellow of the head more glossed with olivaceous. 



A specimen from South Illinois (10111) has the yellow glossed in patches with red. 



List of specimens. 



Section GeotMypeae. 



Bill distinctly notched but without bristles. Hind toe considerably longer than the lateral. Legs long and stout, consider- 

 ably exceeding the middle toe, and as long or decidedly longer than the skull. Under tail coverts long. Legs yellow; tail 

 unspotted. Color olive above, belly yellow, unspotted. 



The North American genera of this section are as follows : 



Geothlypis. — Wings rounded, scarcely longer than the considerahly graduated tail ; first 

 quill shorter than fourth. 



Oporornis. — Wings pointed, much longer than the nearly even tail. First quill almost 

 longest. 



GEOTHLYPIS, Cab an is. 



THchas, SwAiNSON, Zool. Journ. Ill, July, 1827, 167, (not of Gloger, March, 1827, equal to Criniger, Temm.) 

 Geolhlypis, Cabanis, Wiegmann's Archiv, 1847, i, 316, 349. — Ib. Schomburgk's Reise Guiana, 1848. 



Bill aylvicoline, rather depressed, and distinctly notched ; rictal bristles very short or wanting. Wings short, rounded, 

 scarcely longer than the tail ; the first quill shorter than the fourth. Tail long; much rounded or graduated. Legs stout; 

 tarsi elongated as long as the head. Olive green above, belly yellow. Tail feathers immaculate. Legs yellow. 



The species of this genus all agree in general external appearance, and are more terrestrial 

 than other sylvicolines. They constitute two well marked sections, the first having shorter 

 wings and more graduated tail, (about .40 of an inch,) with longer legs than the second, which 

 is more like the typical sylvicolas. 



According to Cabanis, Gloger used the name Trichas, in March, 1827, for what Temminck 

 had previously called Criniger. As Svvainson's name was published in the number of Zoo- 

 logical Journal for April — July, 1827, it of course loses priority. The date of Gloger's article 

 I take on the authority of Cabanis, as I have not been able to find it myself. 

 The following is a synopsis of the species : 

 A. — Tail graduated. Throat and breast yellow, sides of the head black. * 



A broad frontal band of black, bordered behind by hoary white ; rest of crown 



like the back G. trichas. 



A narrow frontal black band, the crown dark ash G. velaius. 



