APPENDIX TO CHECK LIST. 137 



No. 450? For occasion of the query see Key, p. 2G7. 

 No. 4GG. A pale form is described from Califoruia. See Ilidgwaj 

 (Am. Nat., viii, 1874, 111). 



4GCa. RALLUS ELEGANS Aui)., 

 var. OBSOLETUS Kidg. 

 CsiliforEiiiiii ISalB. 



No. 470. A peculiar variety of the black rail is described from th*- 

 Farallones by Mr. liidgway (Amer. Nat., viii, 1874, 111). 



470a. PORZANA JAMAICEWSIS (Gm.) C.\ss.. 

 var. coTuitxicuLus Bd. 



No. 472. The relationships of this form to tlie European G. chloropnx 

 require furtlier investigation. It will probal)ly stand as 



472. GALLINULA CHLOROPUS Lath., 

 vnr. GALKATA (Licht.) Ilartl. 



No. 479? Compare Key, p. 282. 



No. 48!). A lighter colored form of dusky duck, with a buff throat, is 

 described from Florida (by Mr. Kidgway, /. c), where it is resident. 



489a. ANAS OBSCURA Gm., 



var. irLViGi:i>A Kidg. 



No. 493? The query indicates probaI)ilitv of only varietal distinction 

 from No. 492. 



No. 501 ? The query indicates probability of only varietal distinction 

 from No. 500. 



No. 575bis. A specimen of the European white-winged tern. Hydro- 

 chelidon levcoptera, was taken in Wisconsin, Jul\' 5, 1873, by Th. Kum- 

 lein, and presented to the Smithsonian by Dr. Brewer. Tiiis is tlie 

 first instance known of its occurrence in this country. 



[575bis.] HYDROCHELIDON LEUCOPTERA (Mkis.) Bom. 

 ItVliite-^viiBg-ed KlacEi Tern. 



Checic List Birds. 0* 



