Fernando, C.H.2012-04-042012-04-041957Ceylon Journal of Science (Biological Sciences)1(2)pp.117-154https://dl.nsf.gov.lk/handle/1/7790Biological SciencesHelophorus brevipalpisHydrophilidaeHelophorus aquaticusDytiscidaeReproductionParasitesPredatorsHydroporus planusAgabus bipustulatusAquatic insectsFreshwater habitatsThe colonization of small freshwater habitats by aquatic insects 1.. general discussion, methods and colonization in the aquatic ColeopteraArticle