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THE AMEBIC AN NATURALIST [Vol. XLII 



lese's own labeling of the segments in the abdomen of 

 Cicada plebeia (Gli Insetti, Fig. 297, page 263). 



An examination of the cuticle in the region of the 

 seventh abdominal gland under the 3 mm. objective of the 

 compound microscope shows that it is free from hairs, 

 which are more or less abundant in other regions of the 

 body. Under the one-sixteenth-inch oil immersion ob- 

 jective one is able to readily discern numerous minute 

 pores (Pig. 3), giving it the appearance of very fine in- 

 grained leather. These pores are more or less regularly 

 distributed over the surface, equally distant from one 

 another, and of equal size throughout the region. Sim- 



ing the Glands of Batelll. 



ilar pores were found on the eighth abdominal pleura. 

 The most diligent search failed to reveal any such struc- 

 tures in any other region of the body. As I shall em- 

 phasize later, these are the openings of true cuticular 

 pores through which the secretions of the underlying 

 glands emerge to the surface. 



Specimens of the spittle nymphs were opened and the 

 underlying fat carefully removed. Although it is difficult 

 to separate the fat from this region without destruction 

 of the glands, enough was removed so as to present a 

 satisfactory area for study. The cells (Fig. 4) in good 

 preparations were clearly defined, mostly hexagonal 

 (occasionally pentagonal), though somewhat irregular 

 from mutual pressure. They lie in close apposition to 

 one another. The nuclei are large, round or oval, and 

 in surface view appear situated in the center of the cell. 



