202 ZOOLOGY BIRDS. 



ing, when folded, nearly to the end of tbe tail; tail emarginate ; tarsus no longer than 

 the middle toe and claw. Hallux little if any longer than its claw ; bill little shorter 

 than tarsus (averaging little over half the tarsus in Dendroica), attenuate, notably 

 depressed, yet very little widened at base; culmen rather concave than convex in 

 most of its length, the under outline almost perfectly straight from extreme base to 

 tip; nasal fossae very large, with a highly developed iiasal scale; rictal vibrissse few 

 and short; plumage without streaks. 



"The form of the bill is quite peculiar, lacking entirely the pariue aspect of that 

 of Dendroica ; it somewhat resembles that of Seiurus. The relationships of P. oliracea 

 appear to be with the Jamaican Kylvicola eoa of Gosse. In habits, it somewhat 

 resembles the Certhiiclce". (OouES, MSS). 



While in the field, my attention being attracted to certain peculiarities of this 

 bird, both structural and as shown in its habits, as compared with the genus ]>< H 

 droica, whicli seemed to amount to generic distinctions, I called the attention of my 

 friend Ur. Elliott Coues to these, and, as a result of his examination of the specimens, 

 he has erected the genus as above given. 



, PEUCEDRAMUS OLIVACEDS (Giraud). 



Olive-headed Warbler. 



Sylvia olivacca, GIEAUD, Birds Texas, 1841, 14, pi. vii, f. 2. SCLAT., Proc. Zuiil. 



Soc., 1855. CC. 



Sylvicola olivacta, CASSIN, 111. Birds Texas, 1855, 2S3, pi. xlviii. 

 Dendroica olivacea, SCLAT., Proc. Zool. Soc., 1852, 298 (Oaxaca; cold region). Id., 



Proc. Zool. Soc., 1859, 3G3 (Jalapa). Id., Out., 1801, 31, No. 190. BD., Rev. 



Am. Birds, i, 1865, 205. BD., BKEW., & RIDG., N. A. Birds, i, 1874, 258. 



HENSHAW, Am. Sportsman, v, Feb. 20, 1875, 328 (introduced into United 



States fauna). 



Wiimamphus olivaceus, SCLAT., Proc. Zool. Soc., 1856, 291 (Cordova). 

 Sylvia tccniata, DUBTIS., Bui. Acad. Brux., xiv, 1847, 104. Id., Rev. Zool., 1848, 245. 

 Sylricola twniata, BON., Oonsp., 1850, 309. 



1IAB. Both coasts of Mexico south into Guatemala, Arizona. 

 This species was given by Mr. Giraud as a bird of Texas ; but the 

 quotation has been disregarded by authors under the assumption that the 

 locality of his specimens was, through mistake, erroneously given. It would 

 appear, however, that its occurrence in Texas is rendered by no means 

 improbable, since the capture of several specimens by our party during the 

 past season in the mountains of Southern Arizona. During a three days' 

 visit to Mount Graham, August 1 to 4, the species was not detected; though 

 this can hardly bo considered as negativing the probability of its occurrence 

 hern as a summer resident, since in so short a period the lime was far too 

 limited to examine, even cursorily, a region abounding at this season in 



