420 
GEN 
510. 
318. 
328. 
Thirteenth Supplement to the A. O. U. Check-List. Auk 
July 
inference, from negative evidence, that G. arctica does not 
occur in North America is erroneous, and there is hence no 
necessity for eliminating No. 9 from the Check-List. 
Aythya vs. \yroca (of. Hower, Suppl. Birds Rhode 
Island, 1903, 9). No change is necessary here; the 
reasons offered for the proposed change are insufficient. 
(C% 11th Suppl., Auk, XIX, 1902, 332.) 
Steganopus tricolor Vie:Lior vs. S. glacialis (cf. COUES, 
Key, 1903. 795). No change is thought to be advisable, as 
the name g/acialis is of doubtful application. 
us PHILOHELA Garay vs. Microptera (of. PocueE, Ornith. 
Monatsb., 1904, 23). ALicroptera of NuTTALL (1834) is pre- 
occupied by ALicropterus LESSON (1831), leaving PAilohela as 
the earliest available generic name for the American Wood- 
cock. 
Meleagris gallopavo merriami NeLson vs. J/. g. 
intermedia (of. GRaNT, Ibis, 1902, 235). The Committee 
has again examined series of Turkeys from Texas, Arizona, 
and Mexico, and finds no reason for reversing its former 
decision. 
Leptotila fulviventris brachyptera (SAlLVvapor!) vs. 
L. brachyptera (of. GoDMAN, Biologia Centr.-Am., Aves, III, 
1902, 259). The two forms are found to intergrade, and 
no change is required. 
Elanus leucurus (VIEILLOT) vs. &. g/aucus (BARTON) (of 
CouEs, Key, 1903, 656). No changes is necessary, as Falco 
glaucus BARTON probably refers to the Marsh Hawk, but is 
not with certainty identifiable. (Cf gth Suppl., Auk, XIX, 
1899, 131.) 
407u. Melanerpes formicivorus angustifrons Bairp vs. 
M. angustifrons (of Brewster, Bull. Mus. Comp. Zool., XLI, 
