The collection of dragonfly exuviae along the Batiscan and Trenche Rivers in the Mauricie region of Québec in 2012 and 2013, lead to the first record of the broad-tailed shadowdragon (Neurocordulia michaeli) for the province. This species, which was recently described by Brunelle (2000), has a more northern distribution than that of the stygian shadowdragon (Neurocordulia yamaskanensis). Both these shadowdragons are more frequent in the temperate zone than the Québec records suggest. The lack of observations is due largely to the secretive and crepuscular nature of the adults, which means that they are less likely to be encountered during standard dragonfly surveys. The results of this study show that the larvae of both species can co-occur along the same stretches of river in the Laurentian foothills. An illustrated species identification key based on the characteristics of their exuviae is provided.