50 



ENTOMOLOGICAL NEWS. 



[February, 



Alimentary canal of a, katydid (Scudderia/urculata) ; h, grasshopper (Acridium obscurum) ; 

 c. cockroach (Blatta orientalis), much enlarged. All the parts of the tract are named, except 

 tne irregular threads surrounding the stomach, which are the Malpighian vessels. They are 

 much more numerous than shown in the figure, and form, in nature, a complete network 

 around the organ. 



