596 KORTH AMERICAN BIRDS. 



instance betraying tlie position of lier nest by i-uiming out, as he ap- 

 proached, from the bush beneath whicli it was concealed. With elevated 

 tail, running rapidly and silently away, tliey disappeared among the slirub- 

 bery. In such cases a careful examination of the sjiot was sure to result 

 in finding an artfully concealed nest, either embedded in the ground or a 

 few inches aboN'e it in the lower branches of the bush. He did not find this 

 species east of the northern end of Great Salt Lake, nor was it seen in the 

 neighborhood of Salt Lake City, where the other species was so abundant. 



The eggs of this species diifer very essentially from those of the P. biline- 

 ata. They are oblong in shape, have a light greenish ground, marked all 

 over the egg with very fine dots of a reddish-brown, and around the larger 

 end with a ring of confluent blotches of dark purple and lines of a darker 

 brown, almost black. They measure .80 by .60 of an inch. They resemble 

 very closely a not uuconmion variety of the eggs of the SpizcUa piisiJla. 



