THE INSECT WORLD. 



143 



the most wanton manner. Near the large cities where the spar- 

 rows are numerous, entire broods have already been destroyed. 

 In 1889 the insects appeared in large numbers in Prospect Park, 

 Brooklyn, and in the surrounding woodland, but in an entire 

 day's careful search I found only a single branch containing 

 eggs ! 



That it may be known in a general way where and when these 

 insects may be expected, the following record of the broods is 



Fig. 105. 



Cicada egg-punctures, seen at a, from outside; b, cut down on puncture to show the 

 two chambers ; c, side view of an egg-chamber ; rf, a pair of egg-chambers from which 

 the eggs have been removed. 



given, with the date of last appearance, the time when they may 

 be next expected, and the country covered by them. The state- 

 ment is made up from the reports and bulletins of the United 

 States Department of Agriculture. 



Brood I. last appeared in 1893 ; will appear again in 1910. 

 Occurs in Massachusetts and Connecticut in small numbers. 



Brood II. appeared last in 1895 ; will appear again in 1908. 

 It covers the northwestern part of Georgia, and appears at thir- 

 teen-year intervals. No very definite limits have been assigned 

 to it. 



Brood III., originally supposed to occur in Ohio in 1887, was 

 based on erroneous information. 



Brood IV. is of the thirteen-year variety, appeared last in 

 1883, ^"^^ will appear again in 1896, covering parts of Florida, 



