17 



DESCRIPTIONS OF SETS. 



Note.- In most cases throughout the following descriptions 

 Ridgway's Nomenclature of Colors has been used as a 

 guide to coloration and shape. Italics denote abnormal 

 points. 



I.— Abnormal Coloration. 



1. Antrostomus vociferus. Whip-poor-will. (Plate 

 I, No. I.)— May 18, 1887. Collected by J. Warren Jacobs, Greene 

 Co., Pa. Two fresh eggs, pure white, unmarked, save for two 

 small faint lavender-gray spots on one. Elliptical oval;1.21x .88 

 1.16x .88 inches. 



2. Sayornis Phoebe. Phcebe. (Plate I, No. 2).— May 6, 

 1894. Collected by J. Warren Jacobs, Greene Co., Pa. Four 

 eggs containing large embryos. Pale creamy-white, with a 

 thickly speckled wreath of cinnamon-rufous around the larger 

 end of each, and not distinguishable from some specimens in a 

 series of Western Flycatcher (Empidonax difficilis) in my collec- 

 tion. .74x58, .75x58, .74x.58 and .78x.56 inch. 



Of a series of ninety eggs (21 sets) now before me, only 

 twenty-f.ve have have any traces of markings, and these only 

 faintly so. It is safe to say that the two lighter marked speci- 

 mens of the present set have as much color pigment as all the 

 other marked eggs in the series. All the dotted eggs in my col- 

 lection have a creamy tinted ground, while the immaculate ones 

 are either pure white or ashy tinted. 



3. Contopus virens. Wood Pewee.— June 14, 1897. Col- 

 lected by J. Warren Jacobs, near Waynesburg, Pa. Three eggs 

 containing small embryos; two arc normally rich cream, heavily 

 marked with blotches of claret and chestnut-brown, heliotrope 

 and pale lavender in a band around the larger ends; the third 

 has a buff-pink ground on the ends which intensifies as it ap- 

 proaches the band of blotches where it blends evenly into the brown: 

 .76x57, .74x.58 and .75x.58 inch. 



4. Empidonax virescens. Green-crested Flycatcher. 

 (Plate I, No 4).- June 3, 1893. Collected by J. Warren Jacobs, 

 Greene Co., Pa. Three fresh eggs, rich creamy-buff, immacu- 

 late. Elliptical ovate; .72x.57, .72x.55 and .72x.57 inch. 



5. Empidonax virescens. Green-crested Flycatcher. 

 —June 8, 1894. Collected by J. Warren Jacobs, Greene Co., Pa. 

 Three eggs containing medium embryos, pale creamy ground, 

 almost devoid of markings, few pin points of liver-brown at ran- 

 dom on the larger ends. Elliptical ovate; .68x53, .71x54 and 

 .70x.53 inches. 



