PLATE 3 



EXPLANATION OF FIGURES 



5 Surface view of the wax glands (focus below the non-glandular hypoder- 

 mis). X 600. 



6 Surface view of normal hypodermis of the intersegmental membrane. X 

 600. 



7 Surface view of cuticula overlying the glandular areas showing pores. X 

 600. 



8 Longitudinal section through a single intersegmental area on the dorsal 

 surface of the female, lateral to the middle line, showing the appearance and 

 location of the wax glands, i, intersegmental membrane; c, cuticula; h, hypoder- 

 mis; g, wax glands; b, basement membrane. X 160. 



9 Longitutinal section through a single intersegmental area on the ventral 

 surface of the male, showing appearance and location of the wax glands, a, 

 muscles; c, wax glands, b, basement membrane; d, intersegmental membrane; 

 e, hypodermis;/, cuticula. X 160. 



10 Portion of the body wall in the region of the wax glands, showing detailed 

 structure, n, non-glandular hypodermis; p, pores; c, cuticula; v, vacuole; r, 

 basement membrane. (No. 10 ocular, 1.8-mm. oil immersion.) 



11 Longitudinal section through a single intersegmental area of a two-day- 

 old nymph, showing the development of the gland, w, hypodermis; t, transform- 

 ing hypodermal cell; s, fully-transformed cell. X 600. 



580 



