We propose a method for using the literature to evaluate host ranges of parasitoids that are candidates for biological control introductions. Data on the parasitoids that attack a given host species can be used as negative evidence concerning the candidate whose host range is being evaluated. By compiling studies for a variety of host species, one can delineate those taxa unlikely to be attacked by the candidate. Using a retrospective case study of a parasitoid introduced into North America, we describe (1) this approach to using the literature to evaluate host range and (2) how well predictions based on such an evaluation match actual host range. Based on the host range of Macrocentrus grandii in Eurasia as reported in the literature, we predicted that the species in the genus Ostrinia are the most likely hosts. Of native North American species, Ostrinia obumbratalis is the only non-target species likely to be attacked by M. grandii. The predicted host range for North America matched the actual host range found in the field. This suggests that a careful literature review could be used as an important source of data on host range of parasitoid species proposed for introduction into a new environment. Published by Elsevier Inc. Animals and man; Control; Biological control; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Land zones; Nearctic region Ostrinia nubilalis (Pyralidae); Control by; Macrocentrus grandii (Hymenoptera); Hymenopteran parasites; Macrocentrus grandii, literature review to evaluate host range prior to introduction usefullness; North America; Biocontrol efficiency, review to evaluate parasite host range prior to introduction usefullness Macrocentrus grandii (Braconidae); Control of; Ostrinia nubilalis (Lepidoptera); Lepidopteran hosts; Ostrinia nubilalis; North America; Biocontrol efficiency, literature review to evaluate host range prior to introduction usefullness none