Spatial variation in host plant availability may lead to specialization in host use and local host adaptation in herbivorous insects, which may involve a cost in performance on other hosts. We studied two geographically separated populations of the seed beetle Megacerus eulophus (Coleoptera: Bruchidae) in central Chile: a population from the host Convolvulus chilensis (in Aucó) and a population...

Summary A taxonomic account of Jacquemontia Choisy in Bolivia and Peru is presented. All recognised species from the two countries are described their distribution, ecology conservation status outlined. Separate keys to occurring each country also provided. mapped illustrated with line drawings and/or photographs. Five new species, boliviana J.R.I.Wood, J. chuquisacensis cuspidata longipeduncul...