354 
Psyche 
[December 
Anomma does forage in trees at heights greater than io feet, they 
are less likely to do so than they are to forage in lower vegetation. 
Cohic (1948) reports that while he observed D. ( ’Anomma) nigri- 
cans foraging in trees to heights of about 10 meters, the nests of 
Crematogcister and Oecophylla were spared or avoided. 
Summary 
1. O. longinoda is an important predator of Anomma driver ants 
and may be the single most important insect predator of Anom- 
ma in areas where the two are sympatric. 
2. In attacking Anomma , an O. longinoda worker reaches into a 
moving Anomma column (foraging or emigrating) and seizes an 
individual Anomma worker in its mandibles, pulling it quickly 
from the column. This is termed the attack phase of the preda- 
tory interaction. 
3. After the Anomma worker is removed from the column, the ini- 
tial O. longinoda forager is joined by sister workers, which to- 
gether immobilize the prey through prolonged stretching. This is 
termed the immobilization phase. 
4. When the Anomma worker is sufficiently immobilized, it is car- 
ried back to the Oecophylla nest by 1 or more workers. This is 
termed the transfer phase. 
5. Individual Anomma workers are unable to successfully defend 
themselves, and little or no alarm is generated in the column 
when the worker is removed. 
6. All Anomma workers, regardless of size, including soldiers, are 
subject to O. longinoda attack. 
7. Immobilization of prey through prolonged stretching may be 
employed by predaceous ants whose mandibles and/or stings are 
ineffective in subduing prey at the individual level. 
8. O. longinoda is an effective predator of Anomma because, (a) it 
usually attacks the Anomma column at a limited number of 
points and generally avoids disrupting Anomma movement; 
(b) it seizes and removes Anomma workers from the column 
quickly, thus avoiding a widespread alarm response; (c) it at- 
tacks from defensively advantageous positions outside of the col- 
umn, reducing its vulnerability to Anomma alarm response. 
9. In areas densely populated by O. longinoda (where the probabil- 
ity of chance encounter is high), an Anomma colony may lose 
several hundreds, theoretically thousands, of workers per day to 
Oecophylla predation. 
