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from the Eastern States. Of these 22 species and six varieties occur in In- 
diana, 29 species and eight varieties in Florida, 11 species and four varieties 
being common to the two states, and seven species and four varieties of our 
eastern forms not occurring in either state. 
While the aggregate number of forms of Orthoptera occurring in North- 
eastern America is few as compared with the Coleoptera, they often appar- 
ently make up in individuals what they lack in number of species. Those 
with which we are most familiar are diurnal and move freely from before 
the intruder on their domains. Those which are nocturnal we know best 
by their strident notes which form the great bulk of the musie of that 
autumnal choir which fills the air at night from mid-July until the hoar 
frosts of autumn haye brought death to the musicians. Blot the Orthoptera 
from our insect fauna and the weird music of nature would almost wholly 
disappear. 
The trills of crickets—black Gryllids, brown Nemobids and white Oecan- 
thids—seem to form most of the night sounds, though the note of the broad- 
winged or true katydid is the loudest and most strident of them all. By 
day the songs of the green grasshoppers—our meadow musicians par ex- 
cellence—ring out from every swale and lowland meadow in unbroken 
syinphony as long as the afternoon sun shines brightly upon the choir. 
By day also the males of our common locusts chirrup and call from their 
grassy retreats, some while at rest, others while winging their way from one 
point to another and still others while hovering a few feet above the sup- 
posed hiding places of the opposite sex. All in all, the order Orthoptera 
comprises one of the most interesting groups of the great class of insects. 
