Bul. 32, Biological Survey, U. S. Dept. of Agriculture. PiaTeE II 
SEEDS AND FRUITS EATEN BY GROSBEAKS. 
(1, Wild black cherry (Prunus serotina). 2, Hackberry (Celtis occidentalis). 3, Juneberry 
(Amelanchier canadensis). 4, Pokeberry (Piytolacca decandra). 5, Flowering dogwood 
(Cornus florida). 6, Rough-leaved dogwood (Cornus asperifolia). 7, Spiderwort (Tra- 
descantia virginiana). 8, Summer grape (Vitis xstivalis). 9, Indian fig (Opuntia opun- 
tia). 10, Bur grass (Cenchrus tribuloides). 11, Button weed (Diodia teres). 12, Milk 
thistle (Mariana mariniana). 1, Natural size; 2, 5, 9, 10 (bur), magnified twice; 6, 7, 8, 
11, 12, magnified three times; 3, 4, 10 (seeds), magnified four times.] 
