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May, 1916 THE SHADOW-BOXING OF PIPILO 99 the strongest of the secondary sex instincts. As I say, it is of interest only when one realizes its cause, and sees the lengths to which it is carried, but I, for one, cannot now resist watching Pipilo with interest and commiseration Fig. 33. A CHARACTERISTIC NEST OF THE ANTHONY TOWHEE IN A SA(IE THICKET. whenever I discover him thrusting and countering with his Phantom Rival of the Pane. Nordboll, California, April 9, 1916.
