BIRDS OF NORTH AND MIDDLE AMERICA. 423 



Adult female.— hength (skins), 85-100 (93.5); wing, 47-51 (48.9); 

 tail, 39-44 (41.2); exposed culmen, 8-9.5 (8.8); tarsus, 14-15 (14.7); 

 middle toe, 9-9.5 (9.2).« 



Cape St. Lucas district of Lower California (San Jose del Cabo, 

 Triunfo, La Paz, Concepcion Bay, Santa Margarita Island, etc.), and 

 opposite parts of southern Sonora (Guaymas, Alamos, Batomotal, etc.).* 



Paroides flaviceps (not Aegithalus flaviceps Sundevall) Baied, Proc. Ac. Nat. Sci. 

 Phila., 1859, 301, 304 (Cape St. Lucas, Lower California). 



Auriparus flaviceps Baird, Review Am. Birds, 1864, 85, part (Cape St. Lucas). — 

 Cooper, Orn. Cal., 1870, 51, part (Cape St. Lucas). — Cooes, Check List, 

 1873, no. 37, part; 2d ed., 1882, no. 56, part; Birds. Col. Val*, 1878, 129, 

 part. — Baied, Brewer, and Eidgway, Hist. N. Am. Birds, i, 1874, 112, 

 part. — Ridgway, Nom. N. Am. Birds, 1881, no. 50, part.— Bblding, Proc. 

 U. S. Nat. Mus., vi, 1883, 343 (Guaymas, Sonora), 534 (Cape St. Lucas).— 

 American Genithologists' Union, Check List, 1886, no. 746, part. — 

 TowNSBND, Proc. U. S. Nat. Mus., xiii, 1890, 137 (Cape St. Lucas). 



lAuriparus] flaviceps Coues, Key N. Am. Birds, 1872, 82, part. 



A [uriparus'] flaviceps Coues, Key N. Am. Birds, 2d ed. , 1884, 269, part. — Ridgway', 

 Man. N. Am. Birds, 1887, 565, part. 



JEgithalus flaviceps Gadow, Cat. Birds Brit. Mus., viii, 1883, 72, part (La Paz, 

 Lower California). 



Auriparus flaviceps lamprocephalus Obeeholsee, Auk, xiv, Oct., 1897, 391 (Cape 

 St. Lucas, Lower California; coll. IJ. S. Nat. Mus.). — Ameeioan Ornitholo- 

 gists' Union Committee, Auk, xvi, 1899, 126 (checklist no. 746a). — Brew- 

 ster, Bull. Mus. Comp. Zool., xli, 1902, 206 ( Cape district, Lower California, 

 except Sierra de la Laguna). 



A[nthoscopus^ flaviceps lamprocephalus Hellmayr, Tierreich, 18 Lief., Mar., 1903, 

 135. 



Genus PSALTRIPARUS Bonaparte. 



Psaltriparus Bonaparte, Compt. Rend., xxxi, Oct., 1850, 478. (Type, P. per- 



sonaius Bonaparte,=Pa™s melanotis Hartlaub. ) 

 Pysaltriparus (typographical error) Westermann, Bijds. Dierk., i, 1851, 16. 

 Psalirites (emendation) Cabanis, Journ. fiir Orn., xxix, July, 1881, 333, in text. 



Very small, slender Paridse, with the bill much less than half as long 

 as head (exposed culmen about equal to length of hallux without claw) 

 and half as deep at base as long; tarsus about twice as long as middle 

 toe without claw; tail longer than wing, much rounded or graduated, 

 and coloration very plain (sometimes with black on sides of head). 



Bill very small, much less than half as long as head (exposed culmen 

 about as long as hallux without claw), much deeper than broad, its 

 depth at base equal to more than half the length of exposed culmen; 

 culmen stronglj' curved, gonys less so. Nostril small, roundish or 

 broadly ovate, concealed by antrorse latero-frontal plumules. Rictal 

 bristles minute, obvious only on close inspection. Wing rather long 



« Six specimens, from Cape St. Lucas district. 



6 For comparative measurements of the Cape St. Lucas and Sonoran series see 

 footnote on p. 421. 



