1972] 
Gotwald — Oecophylla 
349 
Bengalia (Calliphoridae) and Stylo gaster (Conopidae) are recorded 
as Anomma predators (Cohic, 1948), the term predator is applicable 
only in the case of Bengalia. Bengalia flies fly about and land near 
Anomma columns and eventually dart toward individual workers, 
stealing their prey or brood (Bequaert, 1922). Stylo gaster , on the 
other hand, is parasitic on insects, particularly cockroaches, that 
flee before Anomma foraging swarms, and on tachinid and muscid 
flies that are attracted to such swarms (Smith, 1967). Stylo gaster 
is also abundant over the swarms of New World dorylines, and para- 
sitizes cockroaches and tachinid flies (Rettenmeyer, 1961). The eggs 
of these conopids are inserted into the host cuticle, and the larvae 
are internal parasites. 
During May and June of 1971, while collecting driver ants in 
Ghana, I observed on 5 separate occasions the ant Oecophylla long- 
inoda (Latreille) (subfamily Formicinae) successfully attacking 
Anomma workers. It became apparent that O. longinoda is a com- 
mon predator of driver ants and that it may be one of the very few 
insect predators of the subgenus. 
Two other species of ants were seen to attack Anomma, but each 
case involved unusual circumstances. In the first case, workers of 
the ponerine ant Paltothyreus tarsatus (Fabricius) carried off the 
larvae and pupae of D. ( Anomma ) nigricans Illiger that had been 
discarded while the nest of the Anomma colony was being excavated. 
In the second case, a small species of Crematogaster dragged away 
Anomma workers that had been injured by an automobile that passed 
over an Anomma column. (Note: driver ants move in columns, 
usually along well marked trails, during foraging and during emi- 
gration or nest relocation). Cohic (1948) also records an encounter 
between Crematogaster and Anomma. 
O. longinoda, commonly referred to as the red tree ant, is con- 
centrated in several areas in the Ethiopian Region and is considered 
to be an efficient predator with a painful bite ( Vanderplank, i960). 
This ant is dimorphic, with its maxima caste performing the forag- 
ing tasks (Weber, 1949). Although O. longinoda previously has 
been recorded as a predator of Anomma by Cohic (1948), Ledoux 
(1950), Vanderplank (i960), Way (1954), and Weber (1949), 
the extent of this predation was, in most cases, not indicated. Note: 
the major weapons in predatory attack for both Oecophylla and 
Anomma are the mandibles. O. longinoda, a formicine ant, is sting- 
less, while Anomma workers possess what appears to be a function- 
less sting. 
Of the 5 observations of Oecophylla predatory behavior, 2 oc- 
