VIREO PHILADELPHICUS VIREO GILVUS. 97 



in England (near Derby, May, 1859 ; Mosley, N. H. Tutbury, 1863, 385, pi. 6 ; Zoologist, 

 1834, 1). S9C)5 ; Haktix\g. Br. Birds, 1872, 99). 



Llculenant IVarrms Expedition. — 8G95, Fremont, Platte River. 



Not obtained by Captain Raynolds' Expedition. 



There is a very great uniformity among the eggs of our Vireonidw ; with 

 specimens before me of oUvaceus, gilvm, bellii, noveboracensis, soUtariuSj 

 audjiavifyons, I can see no difference, except in size. They are all pure 

 white, very sparingly sprinkled, chiefly about the larger end, with tine 

 sharp dots of dark brown. ISoUtarius and Jiavifrons, on the whole, may 

 average a little the heaviest spotting : in one case of novehoraeenHu there 

 are no spots, but its fellow from the same nest is spotted. Likewise, a 

 whole set of V. hellii are immaculate, and in another set there is but a 

 mere speck here and there over the surface. Eggs of hellii.i the smallest, 

 measure 0.70 or less by about 0.50 ; those of noveboracensis are a trifle 

 larger ; a specimen of gilvus is 0.74 by 0.54: ; fiavifrons, solitarius, and 

 olivaccns, are 0.80 to 0.85 by 0.55 to O.GO. Nidihcation is essentially the 

 'same throughout; a thin-walled, cnp-shaped nest, of various fibrous 

 material, is suspended by the brim betwixt the forks of a twig. 



VIREO PHILADELPHICUS, Cass. 



Brotlierlj-IoYC Vireo. 



Vireosylvia philadclphica, Cass., Pr. Phila. Acad, v, 1851, 153 ; vi, pi. 1, fig. 1. — ScL. & 

 Salv., Ibis, 1859, 12 (Guatemala).— Bd., Rev. 1866, 340.— Lawp.., Ann. Lvc. N.. 

 Y. ix, 1868, 96 (Costa Rica).— Salv., P. Z. S. 1870, 187 (Veragua).— B. B. & R.,. 

 N. A. B. i, 1874, 367. 



Virco philadelphicus, Bd., B. N. A. 1858, 335, pi. 78, fig. 3 (Wisconsin and Ohio).— Wheat.,. 

 Ohio Agric. Rep. 1860, No. 114.— CocES & Puent., Smiths. Rep. 1861, 410.— 

 HaiMLIN, Rep. Maine Board Agric. 1865 (Waterville, Me. ; only New England 

 record). — Coues, Pr. Ess. Inst, v, 1868, 277. — Allen, Mem. Bost. Soc. i, 1868, 

 517 (Illinois).— TukNB., B. E. Pa. 1869, 19 (very rare).— Coues, Key, 1872, 

 120, tig. 62. 



Virensijlvia cohanenm, ScL., P. Z. S. 1860, 463; Ann. Mag. N. H. 1861, 328. (Vera Paz.) 



Hub. — Eastern North America. North to Hudson's Baj^ ; south to Central America. 

 No Mexicau or West Indian quotations. 



From the . rarity of this species along the Atlantic coast, and its 

 comparative frequency of occurrence in the interior, it would seem prob- 

 able that it migrates chiefly through the Mississippi, and I conlidcntly 

 anticipate that it will be found breeding in the Missouri region. It is 

 more than likely that Mr. Trippe's queried citation (Minnesota, Pr. Ess. 

 Inst, vi, 1871, 117) really does belong here, and not to gilvus. Dr. Brewer 

 informs me by letter that one was shot near Calais, Maine, by Mr. Board- 

 man, in the spring of 1872, and others found the latter part of May in 

 northwestern Maine, by Mr. Brewster — an occurrence not mentioned by 

 j\Ir. Maynard in his late excellent paper. Dr. Brewer adds that it is 

 "abundant" every spring, about May 21:th, in Wisconsin. I found it 

 quite common along the Ked liiver of the North, about Pembina, in 

 June, an<l it doubtless breeds there. It frequented the heavy timber of 

 the river-bottom, iu company with V. oliraccoK.s and V. (jilviis. 



VIKEO GILVUS, (Vieill.) Bp. 



Warbling Vireo. 



a. yilvus. 



MuHcicapa qilra, Vikill., Ois. Am. .Sept. i, 1807, 65, pi. 34. 



Virco gilt-Ks, Br., Obs. Wils. ls-25, No. 123; Syn. 1828, 70; List, 1838, 26.— Nfrr., Man. i, 

 1832, 309.— All)., Oru. Biog. ii, 1834, 114 ; v, 1839, 433 ; Syu. 1839, 161 ; B. Am. 



7 



