184 
Psyche 
[Vol. 93 
Creighton, W. S. 
1950. The ants of North America. Bull. Mus. Comp. Zool. 104: 1-585. 
Davidson, D. W. 
1982. Sexual selection in harvester ants (Hymenoptera: Formicidae: Pogono- 
myrmex). Behav. Ecol. Sociobiol. 10: 245-250. 
Echols, H. P. 
1966. Compatibility of separate nests of Texas leaf-cutting ants. J. Econ. Ent. 
59: 1299-1300. 
Gamboa, G. J. 
1974. Surface behavior of the leaf-cutter ant Acromyrmex versicolor versicol- 
or Pergande (Hymenoptera: Formicidae). Masters Thesis; Arizona St. 
Univ., Tempe, Arizona. 
1975. Foraging and leaf-cutting of the desert gardening ant Acromyrmex versi- 
color versicolor (Pergande) (Hymenoptera: Formicidae). Oecologia 
(Berl.) 20: 103-110. 
1976. Effects of temperature on the surface activity of the desert leaf-cutter 
ant, Acromyrmex versicolor versicolor (Pergande) (Hymenoptera: For- 
micidae). Amer. Midi. Natur. 95: 485-491. 
Hamilton, W. J. 
1973. Life’s Color Code. McGraw-Hill, New York, N.Y. 
HOlldobler, B. 
1976a. Tournaments and slavery in a desert ant. Science 192: 912-914. 
1976b. The behavioral ecology of mating in harvester ants (Hymenoptera: For- 
micidae: Pogonomyrmex). Behav. Ecol. Sociobiol. 1: 405-423. 
1976c. Recruitment behavior, home range orientation and territoriality in har- 
vester ants, Pogonomyrmex. Behav. Ecol. Sociobiol. 1: 3-44. 
1981. Foraging and spatiotemporal territories in the honey ant Mrymecocys- 
tus mimicus Wheeler (Hymenoptera: Formicidae). Behav. Ecol. Socio- 
biol. 9: 301-314. 
HOlldobler, B. and E. O. Wilson. 
1977. The number of queens: An important trait in ant evolution. Naturwis- 
senschaften 64: 8-15. 
Markin, G. P., H. L. Collins, and J. H. Dillier. 
1972. Colony founding by queens of the red imported fire ant, Solenopsis 
invicta. Ann. Entomol. Soc. Am. 65: 123-124. 
Mintzer, A. 
1979. Colony founding and pleometrosis in Camponotus (Hymenoptera: 
Formicidae). Pan-Pacific Entomol. 55: 81-89. 
Mintzer, A. and S. B. Vinson. 
1985. Cooperative colony foundation by females of the leafcutting ant Atta 
texana in the laboratory. J. New York Entomol. Soc. 93: 1047-1051. 
Nagel, H. G. and C. W. Rettenmeyer. 
1973. Nuptial flights, reproductive behavior and colony founding of the west- 
ern harvester ant, Pogonomrymex occidentalis (Hymenoptera: Formici- 
dae). J. Kansas Entomol. Soc. 45: 82-101. 
Pfennig, D. D., G. J. Gamboa, H. K. Reeve, J. S. Reeve, and I. D. Ferguson. 
1983. The mechanism of nestmate discrimination in social wasps ( Polistes , 
Hymenoptera: Vespidae). Behav. Ecol. Sociobiol. 13: 299-305. 
