2IO INTRODUCTION TL OGY. 



:ul includes the antcnnal tubercles. The membrane of 

 tile lacks the discal whit md the basal half of the 



clavi; 



the many smaller representatives of this family tlu 

 lowing is the best known: 



The Chinch-bug, missus Icncdptcnts. This well-known pest of 



:i-fields is .1 small bug, which when fully grown measures a little 



than 4 mm. (<Xl6 in.) in length. It is blackish in color, with o>n- 



'\\y-white wing-covers. There is on the costal margin of 



>ver near the middle of its length a black spot ; from each 



ts there extends towards the head a somewhat V-shaped 

 ';y line. The body is clothed with numerous microscopic hairs. 

 In Fig. 1 80 this insect is represented natural >i/e 

 and enlarged. The species is dimorphic, there being 

 a short-winged form. 



There are two generations of the Chinch-bug 

 year. The insects winter in the adult state, hiding 

 180. BUS- beneath rubbish of any kind; thev even penetrate 



tus Uucopterus. J J 



forests and creep under leaves, and into creVK 

 bark. In early spring they emerge from their winter qua; 

 and pair; soon after the females begin to lay their this 



they do leisurely, the process being carried on for two or three 

 ks. The eggs are yellowish ; about 500 are laid by a single in- 

 re deposited in fields of grain, beneath the ground upon 

 the roots, or on the stem near the surface. The eggs hatch in about 

 weeks after being laid. The newly-hatched bugs are red ; they 

 i at first on the routs of the plants which they infest, sucking the 

 juices; afterwards they attack the stalks. The bugs become full- 

 vn in from forty to fifty days. Before the females of this brood 

 hey leave tli inal quarters and migrate in 



.bundant supply of food. About this time the 

 wheat becomes dry and hard; and the migration appears to 1 



Although the in [Retimes go in different 



ral rule the ma^es take one direction, which is 

 held of :ii, or some- other cereal 



that is still in a succulent state. At this time many of the 1) 

 have not reached the adult state; and even in the case of the fully- 

 winged individuals the migration is usually on foot. In their new 

 quarter- the bugs lay tli cond or fall brood. 



Satisfactory means of preventing the ravages of this insect are 



