350 IJiaDS OF ILUNOIS. 



B. Hiz<' Kiimll iwliiR.I.GO or I08H); slilcs of rump without cotispicuous cottony tuft. 



J C. vireni. Aliovo olivu-sliity, tlii' lioml dnrker; sidos olIvc-ffriiylHh. this (•oloritl- 

 uiost iiK-i-iine across tliu breast; throat oiid abdomen whitish. Wins. 3.9(^.40; 

 tidl.2.l»-3.i>n. 

 3. C. riohardionil. Colors of C rireii*. but breast uniform eraylsb, and upper parts 

 with 1. v-s of an olive tlnec Wing. 3.2&-3.60; tail. 'J. 80-3. 20. 



Contopus borealis (Swains.) 



OLIVi; SIDED FLYCATCKEH. 



Turanntia hnrralis 8w. F. B.-A. 11. 1831. Ul. pi. 35. 

 Contopiia hui-fnlia Baibd. B. N. Am. 1858. 188; Cat. N. Am. B. 1850. No, 137.-Cof ES. 

 Kcy.lKTS, l~.l; ClieikLi»t.l874,No, «Si; 2d ed. 1882, No. 380; B. N. W. l>f;4.213.-B. B. & 

 R. Hist. N. Am. B. il. 1874.353, pi. 44. Rg. l.-Riuow. Nom. N. Am. B. 1881, No. 318. 

 Miturirara iiwrnata "CooP. &NuTT.." NuTT. Man. 1. lSt2,2S5. 



Miisriinija rooperi NUTT. Man. 1. 1832. 'JSi.— AUD. Orn. Biog. 11.1834.422: pi. 174; Synop. 

 1S». 41 ; B. Am. 1. 1840, 212. pi. 58. 

 Turanutm cooperi Bp. 1838. -Nutt. Man. 2(1 ed. i, 184(1.298. 



Hab. Whole of temperate North .\merli-a. but eolder reelonsonly in summer, breed- 

 hiB from northern border of the United States northward, farther south on hleher moun- 

 tain nines, especially westward; also breeding in more elevated districts of Mexico, 

 and migrating south as far as Veragua. 



"Sp. Chab. Wings long, much pointed; tile second quill longest; the flrst longer 

 than the third. Tail deeply forlicd. Tarsi short. The upper parts ashy brown. showing 

 darker brown centres of the feathers; this is eminently the ease on llie toi> of tlie head; 

 the sides of the head and neck, of tlie breast and body, resembling the back, but with the 

 edges of the feathers tinged with gray, leaving a darker central streak. The chin, til roal, 

 narrow line down the middle of the breast and body, abdomen, and lower tail-coverts 

 white or sometimes with a faint tinge of yellow. The lower tail-t-nverts somewhat 

 streaked with l)rown in the centre. On each side of the rump, generally concealed liy 

 the wings, is an elongated bunch of white silky feathers. The wings and tail very dark 

 brown, the former with the edges of the s(\eondaries and tertials edged with dull white. 

 The lower wing-coverts and axillaries grayish brown. The tips of the primaries and 

 lail-feathers rather paler. Feet and upiier mandible black, lower mandilile brown. The 

 young of the year simihir. but the color duller; edges of wing-feathers dull rusty instead 

 of grayish white. The feet light brown. Length. 7. 50; wing, 4.33; tail, 3.30; tar8US,.60." 

 (Hist. X. Am. 11.1 



The Olivo-sided Flycatcher is confined ahnost cxchisively to the 

 northern coniferous forests, inchiding their southern extension along 

 the higher mountain ranges, the principal of which it follows through 

 Mexico and Guatemala. Ixegarding its occurrence in Illinois, the 

 only knowledge we have is Mr. Nelson's note (Hull. K.iKc.r Inst. VIII. 

 1870, p. 113), to the following eflfect : 



"Not an uncoiiimon migrant, from May 15th to '2.5th and the last 

 of Septemher and tiie lu'st of October. I have taken one specimen as 

 late as June 2d. It may hreed." 



