The Inhabitants of the Aquarium 297 



other countries are of considerable size, 

 measuring from two, to two and a half 

 inches in length. Notonecta and Nepa 

 should be handled with care, as they will, 



Fig. 120. Giant Water-bug, Belostoma 

 americana. 



without warning, inflict very painful stings. 

 The pain of these stings may last for a few 

 hours, but they never have been known to 

 leave anv more serious after effect. 



