BIEDS OF NORTH AND MIDDLE AMERICA. 423 



Adult female.-l.^x^gt\^ (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. (); 

 middle toe, 9-9.5 (9. 2).« t - ^ i n K 



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



Triunfo. La Paz, Concepcion Vr.xy. Santa Maroanta Island, etc.), and 



opposite parts of southern Sonora ((iuaynias. Alamos. Batomotal, etc.).'^ 



Paroides ilnviceps (not Aegithalus flainceps Sundcvall) Baird, Proc. Ac. Nat. Sci. 



Phila., 1859, SOI, 304 (CapeSt. Lucas, Lower California). 

 Auriparus tJavicepH Baird, Review Am. Birds, 1864, 85, part (Cape St. Lucas).- 

 CooPER, Orn. Cal., 1870, 51, part (Cape St. Lucas). -Couas, Check List, 

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

 part. -Baird, Brkwer, and Ridgway, Hist. N. Am. Birds, i, 1874, 112, 

 part.-RiDGWAY, Norn. N. Am. Birds, 1881, no. 50, part.-BELDixG, Proc. 

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

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

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

 [Auriparus'] tiaviceps Coues, Key N. Am. Birds, 1872, 82, part. 

 Ainriparus] flarnceps Coues, Key N. Am. Birds, 2d ed., 1884, 269, part.-Rii.cavAV, 



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

 yEgithalm flaviceps Gadow, Cat. Birds Brit. Mus., viii. 1SS3. 72, part (La Paz, 



Lower California). _ 



Anriparm fiaviceps lamprocephalm OsERnohSTSK, Auk, xiv, Oct., 1897, 391 (Cape 

 St Lucas, Lower California; coll. U. S. Nat. Mus.). -American Ornitholo- 

 gists' Union Committee, Auk, xvi, 1899, 126 (check list no. 746rt). -Brew- 

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

 except Sierra de la Laguna). 

 A\_nthoscopus]flanceps hnnprocephalas Hellmayk, Tierreich, 18 Lief., Mar., 1903, 



135. 



Genus PSALTRIPARUS Bonaparte. 



Psaltriparus Bonai'akte, Compt. Rend., xxxi, Oct., 1850, 478. (Type, P. per- 



sonatm Bonaparte,=P«n(s meUuioiii^ Hartlaub. ) 

 PysaltHparus (typographical error) Westicrmaxn, Bijds. Dierk., i, 1851, 16. 

 Psaltrites (emendation) Cabanis, Journ. fur 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 ])lack on sides of head). 



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

 ubout 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 strongly 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. 



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

 footnote on p. 421. 



