1968] 
Leuthold — Crematogaster 
337 
Recruiter 
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Fig. 2. Alerting performance of a recruiter ant. Numbers indicate the 
stroking movements towards the encountered worker. (From movie film, 64 
frames per second). 
the food and feed for a few seconds up to 5 minutes. After feeding 
it often turns straight back with the abdomen more or less swollen. 
Sometimes it circles around the food area several times before return- 
ing or even returns before touching the food at all, excited solely by 
the smell. (The latter behavior most frequently occurred after the 
colony had been starved a long time, viz. ten days or longer.) In all 
possible cases the food source induces the active recruitment behavior 
of the explorer ant. Hence uptake of food is not needed for the 
