ORDER IIKMII'I 



morphosis, I nt> the ti the 



chinch-bug, tin.' young having no wings. After n 



t 



Fio. 62. — Longitudinal section of bug's head. Ibr, labrum; V>. labium: md, 

 mandible; rnx, maxilla; to, salivary gland (the arrows pointing oul 

 show the Jivary duct into tin- mouth; the inward-pointing 



arrows indicate the throat and the direction taken by the f'H>,i in ■, 

 the stomach ; I, t, x, muscles which I of the mouth.— 



(lit 



the stage <, tin- wings appear as in the ■. This 



bug does immense harm to farmers by sucking the Bap of 

 wheal ami corn. 

 Certain species of Eemiptera arc apterous; th< 





•.. • 



r 





\s- 



Fig. 63.— The Chinch-hup: and its earl] 



pups; t,beak;d, tarsus of larva; j, tarsus of perft 



differ in the form of the body and fore w 



joints of their antenna', and in their tar-;: vvl 'the females 

 are generally larger and more robust than the males, hut 

 they do not commonly differ much in (Darwin's 



Descent of Man. i. 339.) 



