156 NOTONECTA. 



with numerous transverse undulated black lines 

 or streaks: it is found in stagnant waters. 



Notonecta minutissima is an extremely small 

 species, with grey wings, marked by longitudinal 

 dusky spots: like the two former, it is an inhabit- 

 ant of stagnant waters, but is far less frequently 

 observed than the rest, on account of its very 

 small size. 



