1978] 
Holldobler & Engel — Glands in Ants 
307 
Figure 7. SEM photograph of cuticular structure of 7 th tergum of Plectroctena 
strigosa. Above: View of the anterior part of the tergum. The cuticular grooves are 
clearly visible. Below: Close-up view of cuticular structure; the tergum is cut, so that 
the cavities beneath the grooves are visible. 
