Morrison, L. W. 1999. Indirect effects of phorid fly parasitoids on the mechanisms of interspecific competition among ants. Oecologia 121: 113-122. Morrison, L. W. and L. E. Gilbert. 1999. Host specificity in two additional Pseudacteon spp. (Diptera: Phoridae), parasitoids ofSolenopsis fire ants (Hymenoptera: Formicidae). Fla. Entomol. 82: 404-409. Morrison, L. W. and J. R. King. 2004. Host location behavior in a parasitoid of imported fire ants. J. Insect Behavior. 17: 367-383. Morrison, L. W., C. G. Dall'Aglio-Holvorcem, and L. E. Gilbert. 1997. Oviposition behavior and development ofPseudacteon flies (Diptera: Phoridae), parasitoids of Solenopsis fire ants (Hymenoptera: Formicidae). Environ. Entomol. 26: 716-724. Morrison, L. W., E. A. Kawazoe, R. Guerra, and L. E. Gilbert. 1999. Phenology and dispersal in Pseudacteon~ddd~~~ddd~~~dd flies (Diptera: Phoridae), parasitoids of Solenopsis fire ants (Hymenoptera: Formicidae). Ann. Entomol. Soc. Amer. 92: 198-207. Morrison, L. W., E. A. Kawazoe, R. Guerra, and L. E. Gilbert. 2000. Ecological interactions of Pseudacteon parasitoids and Solenopsis ant hosts: environmental correlates of activity and effects on competitive hierarchies. Ecol. Entomol. 25: 433-444. Morrison, L. W., S. D. Porter, E. Daniels, and M. D. Korzukhin. 2004. Potential global range expansion of the invasive fire ant, Solenopsis invicta. Biol. Invasions 6:183-191. Oi, D. H. and D. F. Williams. 2002. Impact of Thelohania solenopsae (Microsporidia: Thelohaniidae) on polygyne colonies of red imported fire ants (Hymenoptera: Formicidae). J. Econ. Entomol. 95: 558-562. Oi, D. H., J. J. Becnel, and D. F. Williams. 2001. Evidence of intracolony transmission of Thelohania solenopsae (Microsporidia: Thelohaniidae) in red imported fire ants (Hymenoptera: Formicidae) and the first report of spores from pupae. J. Invert. Pathol. 78: 128-134. Pemberton, R. W. 2000. Predictable risk to native plants in weed biological control. Oecologia. 125: 489-494. Porter, S. D. 1998a. Biology and behavior ofPseudacteon decapitating flies (Diptera: Phoridae) that parasitize Solenopsis fire ants (Hymenoptera: Formicidae). Fla. Entomol. 81: 292-309. Porter, S. D. 1998b. Host-specific attraction ofPseudacteon flies (Diptera: Phoridae) to fire ant colonies in Brazil. Fla. Entomol. 81: 423-429.