J.02 Merriam on Sfizclla arenacea. [October 



53. Larus cachinnans Pall. — Considered by Stejneger to 

 be Larus vegcB (Pahneii). (Cf. Stejneger ., Auk, V, 188S, p. 310.) 



[2SS]. Jacana gymnostoma {Wagl.) — Considered by 

 Elliot to be yacana spinosa (Linn.). (Cf. Elliot., Auk, V, 

 July, iSSS, p. 397.) 



306. Tympanuchus cupido {Linn.). Renamed by Coues 

 Cupidonia cupido brezusteri. (Cf. Coues., Key, 1SS7, Appen- 

 dix, p. 8S4.) 



419, Nyctidromus albicoUis {Gtnel.). — The Rio Grande 

 Valley form has been described as Nyctidromus albicollis mer- 

 rilli Senn. (Cf. Sennett, Auk, V, Jan. 1888, p. 44.) 



602. Sporophila morelleti {Bonap.). — The Rio Grande 

 Valley bird is considered by Sharpe to be Spennophila parva 

 Lawr. (Cf. Sharpe, Cat. Bds. Brit. Mus. Vol. XII, 1888, p. 124.) 



706. Harporhynchus longirostris {La/r.). — The Texan 

 bird has been described as Harporhynchus longirostris sennetti 

 Ridgvv. Cf. Ridgway, Proc. U. S. Nat. Mus. 1S87, p. 506.) 



719 <5. Thryothorus bewickii bairdi {Salv & God?fi.). — 

 Now known as Thryothorus bewickii murinus (Hartl.). (Cf. 

 Ridgway, Auk, IV, Oct. 1SS7, p. 349.) 



DESCRIPTION OF THE BREEDING PLUMAGE OF 



CHADBOURNE'S FIELD SPARROW {SPIZELLA 



ARENACEA), WITH EVIDENCE OF 



ITS SPECIFIC DISTINCTNESS. 



BY DR. C. HART MERRIAM. 



Two years ago Dr. Arthur P. Chadbourne described* a new 

 Spizella from southern Texas. His description was based on 

 specimens in winter plumage, from which he assumed the new 

 form to be merely a subspecies of Spizella piisilla. Mr. Ridg- 

 way redescribed the bird in his new ' Manual of North American 

 Birds,' but was no better off for material, all of his specimens 

 being in fall or winter plumage (though not so stated in the 

 Manual). Mr. Vernon Bailey has recently sent me an adult 



* Auk, III, April. 1886, 248. 



