1867.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 507 



dusky grayish or grayish brown. Lower j)arts white or buft'y wliite 

 (sometimes more strongly tinged with bufiy), quite immacuhxte on chin, 

 throat, and abdomen ; along each side of throat a series of bhickisli or 

 dusky streaks, sometimes crowded or coalesced into a nearly continuous 

 streak ; chest, breast, sides, and flanks sharply streaked with black or 

 dusky, these streaks usually more or less wedge-shaped anteriorly ; under 

 tail-coverts more decidedly buflty, the central or concealed portion of 

 the feathers clear (usually light) brown. Bill black or brownish black, 

 the basal half of under mandible pale-colored. Length (before skin- 

 ning) 11-11.75, wing 3.90-4.15 (4.01), tail 4.95-5.45 (5.19), exposed culmen 

 .95-1.15 (1.03), bill from nasal fossa .75-.88 (.78), tarsus 1.30-1.45 (1.37). 



Young : Essentially like adults, but wing-bands buffy and less sharply 

 defined, markings on lower parts duller and less sharply defined, and 

 under tail-coverts without brown central spaces. 



Upon comiiaring a series of nineteen adults of this species from south- 

 ern Texas with specimens of true R. longirosfris from Mexico, I was 

 much surprised to find them so different. The difference in coloration 

 is not only very constant, but so obvious as to enable one to at once 

 separate the birds into two series. 



I take much pleasure in naming the Texan race after Mr. George B. 

 Sennett, to whom is due so large a proportion of our knowledge of the 

 birds of southern Texas, and to whom I am indebted for the loan of his 

 entire series of the new form. 



4. Campylorhynchus castaneus, sp. nov. 



Campylorhynchus capistratus (nee Gray, ex Less.) Scl., Pr. Ac. Nat. Sci. 

 Phil., 1856,264 (part); Catal. 1862, 17, (part ? Escuintla Guat,)— Scl. & 

 SALV.,Ibis, 1859, 8 (Belize); Noin. Neotr. 1873,5 (part).— Taylou, Ibis, 

 1860, 317 (Honduras). — Baird, Review, 1864, 104 (part; Savanna Grande, 

 Guat).— Salv., Ibis, 1866, 202 (Guatemala).— Salv. & Godm., Biol. Centr. 

 Am., Aves, i, 1880, 64 (part).- Sharpe, Cat. B, Br. Mus. vi, 1881, 191 

 (part^. 

 Campylorhxjnchus rufinucha {nee Lafr.) Salv., Ibis, 1866, 191 (Montagua 

 Valley, Guatemala). 



Sp. char. — Resembling C. capistratus (Less.), but back and scapu- 

 lars entirely uniform chestnut, the rump also plain chestnut super- 

 ficially, though with concealed streaks of white and black ; size less 

 (wing 2.80-2.90, tail 2-50-2.75, exposed culmen .75-.80, tarsus .95-.1.05). 



Habitat. — Guatemala and Honduras. (Type, No. 42588, Spanish 

 Honduras : Ilges & Sauter). 



Three specimens (one from Savanna Grande, Guatemala, and two from 

 Spanish Honduras differ conspicuously in the above characters from five 

 examples of C chpistratus, from Nicaragua (Sucuya and San Juan del 

 Sur) and Costa Rica (Puuta Arenas and La Palma). I have not yet 

 seen a Mexican species of either form, C. rufinucha Lafr. being unques- 

 tionably a distinct species.* 



*One of the Mirador examples, (No. 28041) referred by Professor Baird to C. rufi- 

 nucha is certainly a C. humilia Scl. in very much worn plumage. 



