(Dana, 1849)
Females: One terminal caudal seta conspicuously thickened; inner spine on terminal segment of P5 considerably shorter and thinner than both terminal spines. More characters can be accessed by backtracking the key:
Page 591
Males: P5 left terminal segment (including stout terminal spine) longer than penultimate segment; armed with 2 stout terminal spines and 2 subterminal spines (not evident in figure). More characters can be accessed by backtracking the key:
Page 1008