form which was described as Ambystoma barbouri (Kraus and Petranka, 1989) and is found in central Kentucky, southeastern Indiana, and southwestern Ohio; the pond form which is found throughout the rest of the range of A. texanum (Petranka, 1982b). The stream-form deposits eggs on the undersides of rocks in streams and produces larger, but fewer, eggs per female than the pond form. Pond-breeding A. texanum attach their eggs to twigs or aquatic vegetation in vernal ponds and are explosive breeders, whereas the stream form is a nonexplosive breeder (Petranka, 1982b, 1984a, 1984b). Explosive breeders mate in large numbers during or immediately following periods of rainfall, whereas nonexplosive breeders mate in smaller numbers throughout the breeding season and seem less dependent on rainfall (Petranka, 1984a). The reproductive biology of pond-breeding A. texanum has received considerable attention in the central