Requested reference
Buckle, D. J. & Redner, J. H. (1964). The Nearctic species of the Xysticus labradorensis subgroup (Araneae: Thomisidae). The Canadian Entomologist 96(8): 1138-1142. doi:10.4039/Ent961138-8 
-- Show included taxa
Buckle, D. J. & Redner, J. H. (1964). The Nearctic species of the Xysticus labradorensis subgroup (Araneae: Thomisidae). The Canadian Entomologist 96(8): 1138-1142. doi:10.4039/Ent961138-8 -- Show included taxa