442 



U. S. p. E. R. EXP. AND SURVEYS — ^ZOOLOGY — GENERAL REPORT. 



througkout, the commissure concave and slightly sannated, the gonys straight. The claws are 

 straighter, or less curved. In other respects of form, &c., there is a very close relationship. 



Synopsis of the species. 



Back with well defined dark hrown streaks. A yellowish superciliary streak from the bill, 

 and a distinct median light line along the top of the head. Bill moderate. 

 Superciliary stripe decided yellow throughout. 



Fore part of breast only streaked. Bill above, .40 ; wing, 2. 65. .'.... P. savanna. 

 Similar to last, but larger and darker. Bill above, .50 ; wing, 2.95. 



P. sandwichensis. 

 Breast and fore part of belly thickly streaked. Under parts with a reddish tinge. 



Bill, attenuated, .42 ; wing, 2.66 P. anthinus. 



Superciliary stripe pale, with little or no yellow. 



Fore part of breast sparsely streaked. Bill slender, elongated P. alaudinus. 



Back grayish brown, with very obsolete and rather darker streaks. No distinct median light 

 line on the crown. Bill enormously large P. rostratus. 



Comparative measurements of species. 



PASSERCULUS SAVANNA, Bo nap. 



Savannah Sparrow. 



Fringilla savarma, Wilsoit, Am. Orn. Ill, 1811, 55 ; pi. 22, f. 2.— Ib. IV, 1811, 72 ; pi. 34, f. 4.— Ano. Orn. Biog. 



II, 1834, 63 : V, 1839, 516 ; pi. 109. 

 Passerculus savanna, Bon. List, 1838. — Ib. Conspectus, 1850, 480. — Cab. Mus. Hein. 1851, 131. 

 Emheriza savanna, AuD. Syn. 1839, 103. — Ib. Birds Amer. Ill, 1841, 68 ; pi. 160. 

 ? Fringilla hyemalis, Gm. I, 1788, 922. — Licht. Verzeicliniss, 1823, No. 250. Gmelin's description, based on 



Pennant Arctic Zool. II, 376, (winter finch,) applies equally well to a large number of species. 

 Linaria savanna, Richardson, List, 1837, 



