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. 
