The effect of thermal acclimation on thermal adaptation and locomotor performance of ant, Polyrhachis vicina Roger Analysis of ant oil extracted with supercritical CO2 fluid from Polyrhachis vicina by GC-MS Effects of nest collecting on the population recovery of Polyrhachis vicina Roger (Hymenoptera:Formicidae) Taxonomic Studies on the Genus Polyrhachis Mayr of China (Hymenoptcra.Formicidae