Smithsonian Report, 1895. 



Plate XXIII. 





5 . 0^ 4*8 • 



1 . — P/io tobacterium sarcophilum . 



2. — Lipura noctiluca (magnified 350 diameters). 





3. — Larva of Lampyra noctiluca in its first stage: 5. — Section of the terminal portion of a male 

 a a', ultimate and penultimate segments. On the Lampyra noctiluca. 



right the luminous organs can be seen, showing o, Photogenic organ, 



through. (Magnified 65 diameters.) 



Physiological Light. 



