PLATE 1 



EXPLANATION OF FIGURES 



1 Larva, ventral view of abdomen. LO, larval light-organ, located on the 

 eighth abdominal segment. 



2 Adult male, ventral view of abdomen. AO, adult light-organ, located 

 on the sixth and seventh abdominal segments. 



3 Adult female taken immediately after emergence, ventral view of abdomen. 

 AO, adult light-organ; I.O, larval light-organ. 



4 Larva, cross-section to show position of the light-organs. R, reflector 

 layer; P, photogenic layer. 



5 Adult male, cross-section to show position of the light-organs. R, reflector 

 layer; P, photogenic layer. 



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