184 BIRDS OF OHIO. 
may be as early as the middle of August, the last passing 
south about September 25. 
256. (663a.) DENDROICA DOMINICA ALBILORA Ridgw. 48. 
Sycamore Warbler. 
Synonyms: Dendrceca dominica var. albilora, Sylvia pensilis, 
Sylvicola pensilis, Dendroica superciliosa, D. dominica. 
White-browed Yellow-throated Warbler, White-cheeked 
Warbler. 
Kirtland, Am. Journal Sci. & Arts, XL, 1841, 21. The first refer- 
ence for the subspecific name as it now stands should be 
Ridgway, Am. Nat., VII, 1873, 606. 
This species appears to breed sparingly across the state, 
but is known by few observers. I have never seen it. Dr. 
Wheaton states that it is the earliest of all the warblers in 
spring, even preceding the Myrtle. If it has passed through 
Lorain county it has entirely eluded careful search for a 
half-dozen years. It certainly does not breed in the western 
half of the county or it would have been found at some 
time. It has actually been found breeding at Cleveland, Mt. 
Vernon, Wauseon, and Cincinnati. More careful search 
for this early warbler should reveal its presence in many 
parts of the state where it is not now known even as a mi- 
grant. 
Reliable migration dates are wanting, but it appears that 
the birds should be looked for early in April, and that some 
remain in the southern counties well into October. Syca- 
more groves appear to be the favorite places for these 
birds. 
257. (667.) DENDROICA VIRENS (Gmel.). 49. 
Black-throated Green Warbler. 
Synonyms: Dendreca virens, Sylvia virens, Sylvicola virens, 
Motacilla virens. 
Kirtland, Ohio Geol. Surv., 1838, 163, 181. 
Unlike the two following species, this one is among our 
commonest migrant warblers. Dr. Wheaton’s designation 
of “Abundant spring and fall migrant,” still applies. It is 
common in the woods, but seems to prefer the lawns, parks, 
