754 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



me (see p. 522, footnote and p. 524 of the present volume); but he is 

 surely in error in doubting the validity of II. h. hry<nitl and I think 

 also in claiming that only one form occurs in southern California. 

 Mr, Swarth's California material apparently did not contain a specimen 

 from the coast district (or any other portion ?) of San Dieg-o County, 

 to which II. h. hn/anti (not typical, however) is restricted in its Cali- 

 fornia range. 



Page 524: To citations of Heleodytes h'unneicapillus coues i ?idiA'. 



Stone and Rehn, Proc. Ac. Nat. Sci. Phila., 1903, 29 (Otero Co., New Mexico, 

 etc.). — SwARTH, Condor, vi, 1904, 19, in text (s. California, Arizona, etc.; ci-it. ). — 

 American Ornithologists' Union Committee, Auk, xxi, 1904, 417. 



Page 529, footnote: To citations of Tliryothorus fasciatmeiitria add: 



EiDGWAY, Proc. U. S. Nat. Mas., xiv, 1891, 522 (Bogota, Colombia; description of 

 type). 



Page 546: To citations of Thryothorus ludovicimiusm,iam.ensis add: 



Baird, Brewer, and Ridgway, Hist. N. Am. Birds, special ed., i, plate facing 

 p. 142. 



Page 558: To citation of Thryomanes hewlcMi leucogaster add: 



Stone and Rehn, Proc. Ac. Nat. Sci. Phila., 1903, 29 (Otero Co., New Mexico). 



Page 694: Add the following, inadvertently omitted: 



KEY TO THE GENERA OF SYLVIID.E. 



a. Acrotarsium booted; tail much shorter than wings, even or emarginate, the rec- 



trices subacuminate at tip; color of upper parts more or less olive or olive-green, 



the tail without black. {Phylloscopinse.) 



b. Nostrils exposed; exposed culmen equal to or longer than middle toe without 



claw; tarsus decidedly less than one-third as long as wing; outermost (tenth) 



primary minute, not more (sometimes much less) than one-third as long as 



ninth; adult males without a red or orange crown-patch. 



Acanthopneuste (p. 694) 

 hh. Nostrils concealed by antrorse latero-frontal plumules or by a single well- 

 developed small feather; exposed culmen much shorter than middle toe 

 without claw; tarsus about one-third as long as wing; outermost (tenth) 

 primary well developed, one-third or more as long as ninth; adult males 



with a red, orange, or orange-yellow crown-patch Regulus (p. 698'> 



aa. Acrotarsium distinctly scutellate; tail about as long as wing (sometimes longer), 

 much rounded, the rectrices broadly rounded at tip; color of upper parts 

 bluish gray or grayish blue (rarely brownish, l)ut not olive, in young), the 

 tail partly Ijlack and white; pileum glossy black in adult males of some species. 

 {PoUoptiihiic. ) PolioptUa (p. 710) 



Page 697: To s^-nonymy add: 



Acanthopneuste borealis American Ornithologists' Union Committee, Auk, xvi, 

 July, 1904, 419, part. 



Page 700, end of first paragraph: For curvierii read cuvierii. 

 Page 710: To citation of Regulus calendula obscurus add: 

 American Ornithologists' Union Committee, Auk, xxi, 1904, 41 {J. 



