J. F.  McAlpine, ?Chapter 77. Periscelididae?, in Manual of Nearctic Diptera, vol. 2, J. F.  McAlpine, Peterson, B. V., Shewell, G. E., Teskey, H. J., Vockeroth, J. R., and Wood, D. M., Eds. Ottawa: Research Branch, Agriculture Canada, 1987, pp. 895-898.