322 
Psyche 
[December 
Figure 22. Above: Sagital section through the gaster of Neivamyrmex nigrescens, 
showing the pygidial gland (PG), postpygidial gland (PPG) and anus (A). Below: Close 
up of sagital section through pygidial gland and postpygidial gland of N. nigrescens. 
(Lettering as in Figs. 5 and 8; R = reservoir). 
