A synoptic review of the ants of California (Hymenoptera: Formicidae) Author Ward, P. S. text Zootaxa 2005 936 1 68 journal article 39107 10.5281/zenodo.171144 7b235ee0-db22-4606-8a01-05936f594932 171144 Genus Linepithema Mayr The introduced Argentine ant, L. humile (Mayr) , is abundant in many urban and agricultural locations in lowland California, and it has invaded natural habitats along rivers and in some coastal regions. Workers avidly tend plant nectaries and honeydew­producing hemipterans. L. humile aggressively eliminates epigeic (above­ground foraging) native ant species ( Ward 1987 ; Human & Gordon 1996 ; Holway 1998). Most California populations of L. humile exhibit a unicolonial population structure, in which there is little or no intraspecific aggression, and they have reduced genetic diversity compared to native populations in Argentina ( Tsutsui et al . 2000 ). Additional references (a sampling only): Buczkowski et al . (2004) , Carney et al. (2003) , Gordon et al . (2001), Heller (2004) , Holway (1999), Holway et al . (1998, 2002), Holway and Suarez (2004) , Human and Gordon (1997) , Ingram and Gordon (2003) , Knight and Rust (1990) , Longcore (2003) , Newell and Barber (1913) , Sanders et al . (2001) , Shattuck (1992a , 1992c ), Smith (1965) , Suarez et al. (1998, 1999, 2001), Tsutsui and Case (2001) , Tsutsui et al . (2003) , Vega and Rust (2001) .