LOCUST. 193 



Some of these various out-of-door Bugs probably do 

 good, by means of their carnivorous habits ; and with 

 regard to the wingless kind, which, to our misfortune, 

 occasionally teaches us that feeding on animal juices, 

 by means of a sucker, is a characteristic of this order, 

 I think we need not enter on its prevention here. 



Three orders still remain of those of which the 

 insects vary little in appearance throughout their 

 lives. Of these three we do not need to enter on that 

 of the Earwigs, Eujylexoptera (Fig. 149), for though 



Fig. li'J. — Earwig. 



injurious in gardens, it does not often occur as a really 

 widespread and serious infestation in fields. Nor do 

 we need to enter on the Orthoptera, the order that 

 includes Grasshoppers and Crickets, so far as injury 

 to our Islands is concerned ; but it is worth notice that 

 we are now and then visited by the true Locust. The 

 unsuitableness of climate makes it very unlikely we 

 should ever be seriously troubled by this terrible 

 scourge, but nevertheless some of the observations 

 taken by the Entomological Commission of the United 

 States of America, as to the effect of cold, and deep 

 burying of the eggs, in retarding date of hatching, 

 are of much practical interest to us, for the size of the 

 eggs allows the specimens to be observed with 

 certainty, and from what happens to them we may 

 at least get hints as to what very likely hnpnens 



o 



