AGENCY OF INSECTS IN FERTILIZING PLANTS. 403 
in the dusk, for, although one may hear him at all hours, 
still he prefers the dim morn or the quiet twilight. The 
Bobolink is an early riser too, and his jolly, jingling notes 
add much to the chorus of bird-voices that now chant so 
sweet a concert on every side. 
The forest birds are now awake, and from the dark, 
distant woods come the faint bell-like notes of the Wood 
Thrush, our prince of songsters. The Veery, and the 
Rose-breasted Grosbeak join in with him, and the woods 
soon ring with the notes of these three birds, who are 
unquestionably our finest songsters. The Vireos, who 
ve been awake some time, lend their sweet voices to 
swell the choir; and as the sun rises in the sky, the con- 
cert each moment grows louder and louder. The Golden- 
crowned Thrush begins his hurried, ecstatic song; the 
Wrens, Catbirds, Orioles; Warblers, and Sparrows, all 
add their notes to the sylvan concert; and by the time 
the sun has lifted himself well above the horizon, all the 
birds are awake and in full song. 
AGENCY OF INSECTS IN FERTILIZING 
PLANTS. ; 
BY W. J. BEAL. 
ncluded from page 260.) 
THERE are two hes peculiarities among certain plants 
by which a cross-fertilization is made most probable, and 
even very sure in some cases, Ete the flowers 
are all perfect and of one form. 
In some of these the stigmas come out and are fertil- 
ized before the anthers of the flower burst open; while in 
