68 
Psyche 
[June 
aggressive and fled when the others fled. Those most con- 
spicuously anomalous were the maxima and these were 
nearly all collected in the first few months. They carried 
food to the nest, aided in dismembering a caterpillar and 
tended membracids. One with worker body and male 
genitalia stroked a membracid as would a normal worker; 
other anomalies were frequently on the pods. They carried 
brood, when the nest was disturbed, like normal workers. 
The anomalies also licked the female integument in the 
observation nest, a typical worker habit. 
Anomalies with one or both of the curious ram’s horn 
antennae (as in Wheeler, 1936, Fig. 1) were able to pursue 
a direct course and no clear asymmetry in motion was 
observed. The winged and apparently female anomalies 
behaved as did the workers and either bit quickly and 
repeatedly or fled. 
The males, which were superficially normal, were uni- 
formly timid, did not bite and either attempted flight or 
concealment. 
Numbers in the Colony 
Systematic collection of the colony was undertaken when 
the colony was discovered to be anomalous. By June 21 
the totals were: 
Apparently normal worker adults — 7284 
pupae 885 
Anomalous worker adults 2919 
” ” pupae 201 
Adult males 94 
Male pupae 48 
Queen 1 
11432 
The July and later collections added 19 alate females, 
including eight anomalies, and several hundred workers. 
Summary 
A nest of the arboreal ant, Cephalotes atratus (L.), 
contained over 10,000 adults during a 10-month period 
of collecting. The workers at first were aggressive and 
