After recently reviewing series of scrupularis from eastern & central states that match the type pretty well (reddish, more orbicular form, lacking faint strigulations near the elytral apices), I am starting to wonder if one of the current Casey synonyms might need to be resurrected for Western specimens matching the above picture (e.g. contractus). The Eastern series were all taken from caves or bat guano. Also, the prosternal setae seem to be a subgeneric character, found in all three Neosaprinus I've now seen from the US, although one species has them concentrated as a tuft just posterior to the sulcus.