PLATE VII 



DWIGHT PLUMAGE AND MOULT 



Photomicrographs illustrating the apparent brightening of color in 

 certain feathers. See explanation on pages 80, 173-175. (Enlarge- 

 ment about 15 diameters.) 



Fig. i. Carpodacus purpureus. Adult Winter Plumage, crown 

 feather slightly worn. (Collection of J. Dwight, Jr., 

 No. 894, Oct. 29th.) 



Fig. 2. Carpodacus purpureus. Adult Nuptial Plumage, crown 

 feather, equivalent to Fig. i plus wear and consequent 

 lossofbarbules. (J. Dwight, Jr., No. 3616, July 7th.) 



Fig. 3. Loxia curvirostra minor. Adult Winter Plumage, newly 

 grown breast feather (the sheath was adherent). (J. 

 Dwight, Jr., No. 1529, Oct. loth.) 



Fig. 4. Loxia curvirostra minor. First Nuptial Plumage, worn 

 breast feather. It was situated beside the one just 

 shown (Fig. 3), which it closely resembled when first 

 developed, a year previously. 



(360) 



