gains through grading out of shadow into light. This unmistakable conspicu- 

 ousness of the most vital parts of this bird separates him from all the galli- 

 naceous birds, from the large rail-class, from trogons, toucans, parrots, macaws, 

 and a vast number of other species in whose costume brilliant scarlet patterns, 

 often far larger than an entire tanager, perform demonstrably a totally obliter- 

 ative part. Of this fact a few moments' experimenting with even stuffed 

 specimens of the Red-and-yellow Macaw in a red-apple tree, or of the Quetzal 

 in summer green-woods, will convince the most incredulous reader. In their 

 cases, as in those of all the other red-patterned species that I have cited, a red 

 pattern conceals its wearer in direct ratio to its own brilliancy. 



Our two Zebra photographs from Schillings, Figs. 88-89, were included 

 in the book mainly to prove that Zebras do frequent reeds, etc., at their drinking 

 times. Obviously, a nocturnal flashlight flaring against their sides and light- 

 ing so much more feebly the scene behind them, totally prevents their coalescing 

 with it. The explanation of this disharmony, on page 136, is inadequate. 



New figures, one of them presenting the experiment suggested on pages 

 248-249, have been substituted for the original 104, 105, and 106 of the first 

 edition. A. H. X- 



MONADNOCK, N. H., 



April, 19 10. 



252 



