The new sp. is described and figured (holotype in MCZ, Harvard Univ., Cambridge, MS). It is differentiated from other Megatypus spp. by the termination of ScP before the wing apex, the smaller wing length, and the relative positions of ScP, RA and RP. A key is presented for the meganeurid genera of North America and for the known spp. of the genus Megatypus.