VIREONID.33 THE VIREOS. 181 



a. ,Pileum bordered along each side by a dusky line. Wing more than 3 inches. 



1. V. olivacea. Above olive-green, the pileum slate-gray; beneath white medially 



the sides olive-greenish; crissum scarcely tinged with yellow; inner edges of 



quills white. 

 -'. V. flavoviridis.* Above yellowish olive-green, the pileum ash-gray; beneath 



white medially, bright greenish olive-yellow laterally, the crissum, lining of 



wings, and inner edges of quills light yellow. 



b. Pileum without dusky border; wing less than three inches. 



3. V. philadelphica. Above grayish green the pileum gray; beneath sulphur-yel- 

 low, more whitish on the chin and abdomen. 



B. First primary well developed, and exposed (.50 of an inch, or more, long). Wing 

 less than 3 inches. 



4. V. gilva. Above olive-gray, the crown not conspicuously different; beneath 

 whitish, the sides tinged with dull buffy. 



a gilva. Wing, 2.65-2.90; tail, 2.20-2.50; bill from nostril, .30-.35. Eastern 

 United States. 



ft swainsoni. Wing, 2.70-3.00 ; tail, 2.20-2.60; bill from nostril, .25-.2S. Bill 

 more depressed, and colors grayer, with less of a buffy cast on sides, etc. 

 Western United States. 



Vireo olivaceus (Linn.) 



BED-EYED VIKEO. 



Popular synonyms. Eed-eyed Greenlet; Bed-eyed Flycatcher. 



Muscicapa olivacea LINN. S. N. ed. 12, i, 1766, 327 (part). WILS. Am. Orn. ii, 1810, 55, pi. 10, 



fig. 3. 



Virt-o olivaceous VIEILL. NUTT. Man. i. 1832, 312. AUD. Orn. Biog. ii, 1834, 287, pi. 150; 

 Bynop. 1839, 162; B. Am. iv, 1842. 155. pi. 243. BAIBD, B. N. Am. 1858, 331; Cat. N. Am. 

 B. 1859. No. 240. COUES, Key, 1872, 120; Check List, 1873, No. 122; 2d ed. 1882, No. 170; 

 B. N. W. 1874, 96; B. Col. Val. 1878, 495. 



Vireosylva olivacea ~Bp. Vireosylvia olivacea BAIED, Review, 1866, 333. B. B. & K. 

 Hist. N. Am. B. i, 1874, 363, pi. 17, fig. 2. 



HAB. Eastern North America, north to "Fur Countries;" west to Rocky Mountains, or 

 even beyond, especially along northern border of United States; winter? from Florida 

 and Cuba to Trinidad and Colombia, but not in West Indies, except Cuba; accidental in 

 Greenland and even in England. 



"Sp. CHAK. (No. 1,418 male, Carlisle, Penn., May, 1844.) Upper parts olive-green. Top 

 of head, from bill to nape, ash-color. A white line from nostrils above and beyond the 

 eye, bordered above by a dusky line forming the edge of the ashy cap, and below by a 

 similar, perhaps paler, loral and post-ocular cheek-stripe. Beneath, including tibiae, 

 white, with perhaps a tinge of olivaceous ash across the breast; the sides of the neck 

 like the back; sides of the body with a faint wash of olive. Axillars and crissum faintly 



* This is a Central American and Mexican species, reaching its normal northern limit 

 in the lower Rio Grande valley in Texas. It has been taken, however, on the Canadian 

 shore of the Lower St. Lawrence, and may possibly occur as a straggler in Illinois, 



