PLATE 8 



EXPLAXATIOX OF FIGURES 



41 Frontal section of the brain of a newly hatched n^-mph, length 1.1 mm., 

 reproductive tj'pe, female. ^lagnification 400 diameters; reduced one third. 



42 Frontal section of the brain of a nymph with ten antennary segments, 

 length 1.3 mm., worker-soldier type, male. Magnification 470 diameters; re- 

 duced one third. 



152 



