1987] Top off, Bodini, Sherman, & Goodloe — Polyergus 269 
searching occurs. This is followed by sideways movements, a phase 
characterized by intensive searching under rocks and leaf litter 
throughout a limited sector. Sometimes, the scout takes a different 
route on the outbound run, return trip, and slave raid respectively. 
The distinctness among these three paths is consistent with the 
hypothesis that scouts rely primarily on visual orientation. The 
importance of scouts was determined by their systematic removal, 
resulting in the absence of raiding on 9 out of 1 1 days. When scout- 
ing was subsequently permitted, raids occurred on 9 out of 12 days. 
Acknowledgments 
We thank Kim Cazier and Terry Inman for their assistance in the 
field. This study was supported by NSF Grant BNS-8402041, and 
by PSC-CUNY Grant 6-66346. 
References 
Allow ay, T. 
1979. Raiding behaviour of two species of slave-making ants, Harpagoxenus 
americanus (Emery) and Leptothorax duloticus Wesson (Hymenoptera: 
Formicidae). Anim. Behav., 27: 202-210. 
Buschinger, A. 
1968. Untersuchungen an Harpagoxenus sublaevis Nyl. (Hymenoptera, For- 
micidae). III. Kopula, Koloniegrtindung, Raubztige. Insectes Soc., 15 : 
89-104. 
Buschinger, A. & Winter, U. 
1977. Rekrutierung von Nestgenossen mittels Tandemlaufen bei Sklavenraub- 
ziigen der dulotischen Ameise Harpagoxenus sublaevis (Nyl.). Insectes 
Soc., 24: 183-190. 
Buschinger, A., Ehrhardt, W. & Winter, U. 
1980. The organization of slave raids in dulotic ants — a comparative study 
(Hymenoptera; Formicidae). Z. Tierpsychol., 53: 245-264. 
Emery, C. 
1908. Osservazioni ed esperimenti sulla Formica Amazzone. Rendicanto delle 
Sessioni della R. Academia delle Scienze, dell’Istituto di Bologna, 12 : 
49-62. 
Harkness, R. D. & Maroudas, N. G. 
1985. Central place foraging by an ant ( Cataglyphis bicolor Fab.): a model of 
searching. Anim. Behav., 33: 916-928. 
Harman, J. R. 
1968. Some aspects of the ecology of the slave-making ant, Polyergus lucidus. 
Entomol. News, 79 : 217-223. 
