SHORTEE AFTICLKS AND DISCUSSION 



AND A CRA1 



Writers on animal ecology and popul; 

 made us familiar with a remarkable babit < 

 water bugs belonging to the genera Zailht 

 these forms it lias been established that the 

 and by superior strength and apparently a 

 ers his back with her eggs. These adhere 

 tegmina to form a dense mass as thick as 1 

 verted thus into "an animated baby carriag 

 it, the male carries the whole brood about 

 hatch, providing them with protection and 

 aeration. It is worthy of note that the hab 

 in widely separated parts of the world, 

 America. Europe, and Jap;m. 



another group of aquatic Hemiptera, the Co 



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