208 



THE CONDOR 



Vol. XX 



over entire surface with fine to larger spots of brownish gray, heaviest on lar- 

 ger end. (See fig. 43.) 



MEASUREMENTS IN INCHES 



For comparison only, I include in the photograph (fig. 43) set no. 4, of 

 two Canada Jay eggs taken with one newly hatched chick in South Dakota, alti- 

 tude 4,400 feet, April 21, 1918. 



Set no. 1 Set no. 2 Set no. 3 Set no. 4 



1.26x.83 1.15x.85 1.20x.90 1.10x.78 



1.26x.85 1.24x.85 1.29x.83 1.15x.77 

 1.20x.86 



Fig. 45. Nest of Canada Jay, taken near Nemo, South Dakota, April 21, 1918. 



The author is greatly indebted to Mr. Smith Riley of Denver, as well as to 

 his field assistants and also to Mr. M. M. "Watson, an experienced oologist, for 

 their interest and cooperation in securing eggs, nests, and data on the habits 

 of the Rocky Mountain Jay and takes this opportunity of expressing grateful 

 appreciation of their efforts in behalf of the Colorado Museum of Natural 

 History. Photographs of the nests and eggs are by J. D. Figgins. 



Denver, Colorado, July 9, 1918. 



