8 NEW YORK STATE MUSEUM 
Fig. 1 Unexpanded bulb of Dolomedes tenebrosus Hentz. The 
tibia (t) is short and thick and bears an external apophysis (exa)) intel 
body of the tarsus or cymbium (cym) is concave internally and partially 
incloses the genital bulb and its accessory appendages; the tegulum (teg.) 
is a heavily chitinized sclerite forming part of the wall of the genital bulb 
and contains the receptaculum seminis; the tegulum bears an appendage, 
the median apophysis (m.a.), slender and semi-transparent in this species but 
well developed and stout in other species of the genus. The conductor (con) 
is membranous, attached to the middle division of the bulb and lies below 
the tip of the grooved fulcrum (ful) which in turn supports the tip of 
the embolus (emb). 
