Requested reference
Gertsch, W. J. (1955). The North American bolas spiders of the genera Mastophora and Agatostichus. Bulletin of the American Museum of Natural History 106(4): 221-254, pl. 3-6. 
-- Show included taxa
Gertsch, W. J. (1955). The North American bolas spiders of the genera Mastophora and Agatostichus. Bulletin of the American Museum of Natural History 106(4): 221-254, pl. 3-6. -- Show included taxa