ÜSiS— ? -f ^ «f ■»■^ Nepidae 049S 



193 



1910 Walthcr Baunacke.Abdominal Sinncsorg.ine bei Nepa cinerea, Zool. Anz. 

 p. 484. 



191 1 S. J. Holmes. — The evolution of animal intellegence. 



1913 Peter Schmidt. — Katalepsie der Phasmiden Biol. Ctblt. Band. 33. p. 193. 

 1918 C. H. Richardson. — The pulsatile vessels in the legs of Aphididae. Psyche 

 p. 15. 



RESUMfi 

 Ranatra chiiiensis before flight, vibrates the body vertically for about a few 

 seconds when the insect bends its prothorax downwards and then the respira- 

 tion becomes very rapid. 



Laccotrephes ruder assumes the death attitude for a few hours when taken out 

 of the water and placed on the ground. 



The pulsatile organs of Ranalra chinensis cease beating for about one minute 

 after flight. 



The drawings introduced in this paper show the different attitudes of Ranatra 

 chinensis according as the light falls upon it from in front or from behind. The 

 arrows indicate the directions of the rays. 



