536 



HEMIPTERA. 



the first object at hand, and undergo their transformations 

 in the usual manner." (American Entomologist, p. 64.) 



The ovipositor of Cicada, as we have observed it in a rudi- 

 mentary state in the pupa, closely resembles that of -^Eschna 

 (Fig. 21), and essentially agrees with that of Bombus, the 

 basal j)air of blades arising from the eighth segment of the ab- 

 domen, as in the humble bee, and the two succeeding pairs 

 forming the ovipositor itself (the outer pah* forming a sheath) 

 arising from the ninth segment. 



NoTONECTiD^ Latreille. The Water Boatmen somewhat 

 resemble the Tettigoniae, but their habits are aquatic ; their 



hind legs are very long, 

 ciliated, and formed for 

 swimming. The body 

 is convex above, but flat 

 beneath ; the head is 

 large and nearty as wide 

 as the rest of the bod}^, 

 with a broad and round- 

 ed front ; the antennae 

 are four-jointed, c o n - 

 cealed beneath the eyes, 

 and the ocelli are want- 

 ing. The different spe- 

 cies of Corixa are com- 

 mon in ever}' pool. Their 



Fig. 541. 



motions are rapid, diving when disturbed rapidly to the bot- 

 tom and seizing hold of submerged objects. They fl}^ Avell, but 

 Avalk with difficulty. The genus is characterized In' the 

 single-jointed fore tarsi, which are flattened and strongly 

 ciliated ; the pro thorax is large, covering the mesotho- 

 rax. C. interrupta Saj' is not uncommon in pools. 



In Notonecta the bod}' is somewhat prismatic in form, 

 and hairy beneath, where in Corixa it is smooth. The 

 fore tarsi are three-jointed, and the hind legs are very 

 rig.542. 2Qj-,g_ Roesel states that "the eggs (which are attached 

 to the stems and leaves of aquatic plants, and are of an oval 

 form) arc hatched in fifteen da^-s ; the young make their ap- 



