12 



INJURIOUS INSECTS 



regarded as the most injurious of the seven. Notwith- 

 standing this, in their perfect state, they are among the 

 most beautiful creatures in the insect world. The Order 

 is divided into Butterflies and Moths. The former are 

 day-fliers, and their feelers or antennm are thickened at 

 the end, and terminate in a kind of knob. The moths 

 have their feelers pointed at the tip, and sometimes with 

 small side-branches. They mostly fly at night, but a 

 subdivision of them fly at twilight. 



Oedek IV.— HEMIPTERA.— The Teue Bugs. 



This Order, (the name of which means " half-winged," 

 a portion of the front wings being thick and leathery), 

 includes some very injurious 

 insects— as the Chinch-bug, 

 Squash-bug, Plant-lice, and 

 the disgusting Bed-bug, while 

 some are carnivorous. The 



Fig. 7. — WHEEL-BUG {Reduvius). Fig. 8. — ^hessian iTiT. 



larvse have much the appearance of the perfect insect, 

 simply differing from them in the lack of wings. The 

 Rcdunua, or Wheel-bug, fig. 7, is an example of the car- 

 nivorous and useful insects of this Order. The character 

 of the larvae is seen in the engraving of the Chinch-bug. 



Ordek V. — DIPTERA. — Two-winged Insects. 



This is the only Order of insects that have but two 

 wings (a fact expressed in the name). It comprises a 



