864 Eeport of State Geologist. 



Nesl, on a limb, 40 to 60 feet up, of rootlets, small twigs and moss. 

 Eggs, S-i; creamy-wliJte, spotted with different shades of brown and 

 purplish; .85 by .63. 



Migrant; generally rare, but found in some numbers about the lower 

 end of Lake Michigan. It has not been reported from the southeast- 

 em half of the State. It may breed in the northern part of the State, 

 as Mr. E. W. Nelson took it as late as June 2, near Chicago. In that 

 vicinity he notes it in spring, from May 15 to 35, and in fall, the last 

 of September and iirst of October (Bull. Essex Inst., December, 1876, 

 p. 113). 



It appears to be a late migrant, frequenting woodland, where it is 

 to be found upon a dead limb at the top of a tall tree. Mr. Eobert 

 Eidgway took it at Wheatland, Knox County, May 12, 1885. That is 

 the only record from the southern part of the State. Mr. Euthven 

 Deane took it at English Lake, May 26, 1889, and Mrs. Hine has noted 

 it at Sedan, Dekalb County. Mr. J. G. Parker, Jr., took a female. 

 May 25, 1896, at Colehour, 111. Mr. C. E. Aiken says it was not rare 

 in Lake County in 1871, when he obtained a number of specimens. 

 They nest late. Major Bendire says nidification rarely begins any- 

 wliere throughout their range before June 1, usually not before June 

 10, and in some seasons not before' July (L. H. X. A. B., p. 2S-I). 



*176. (461). Contopus virens (Linn). 



Wood Pewee. 



AduU. — Above, dark olive-gray or olive-brown, darker on liead; 

 wings and tail, brownish-black, with an olive gloss, the former with 

 the wing coverts edged with whitish; the latter, unmaxked; white ring 

 around eye; below, light olive gray on breast, whitening on throat; 

 belly and under tail coverts, pale yellowish; bill, above black, below 

 yellow. Immature. — Similar, but more olive above; nape, tinged with 

 ashy; rump and upper tail coverts, with rusty; wing coverts, edged 

 with light buff; below, lighter; forepart of lower mandible, dusky. 



Length, 5.90-6.50; wing, 3.00-3.45; tail, 2.50-2.90. 



Eange. — America, from Ecuador north over eastern United States 

 to New Brunswick and Manitoba; west to the Plains. Breeds from 

 southern limits of United States northward. Winters south of United 

 States. 



Nest, on horizontal limb, 8 to 20 feet high, of bark, shreds, rootlets, 

 vegetable fibre, covered with lichens. Eggs, 2-4; white or creamy- 

 white, speckled and blotched with different shades of brown and pur- 

 ple about the larger end; .72 by .54. 



