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[Vol. 93 
Table 3. Rogers’ (1972) coefficients of genetic similarity (S) for comparisons of 
four subspecies of Neaphaenops tellkampfi. Values shown are averages of pairwise 
comparisons of appropriate populations. Values in parentheses are the ranges of 
similarity values appropriate to each comparison. 
Subspecies 
No. of 
Pops. 
N. t. h. 
Subspecies 
N. t. m. N. t. t. 
N. t. v. 
henroti 
3 
0.975 
(0.971-0.978) 
meridionalis 
3 
0.748 
(0.732-0.766) 
0.956 
(0.942-0.983) 
tellkampfi 
8 
0.963 
(0.928-0.982) 
0.730 
(0.689-0.763) 
0.963 
(0.917-0.995) 
viator 
3 
0.741 
(0.714-0.758) 
0.740 
(0.727-0.766) 
0.737 
(0.713-0.765) 
0.963 
(0.945-0.984) 
mer. X tell. 
hybrid 
1 
0.878 
(0.863-0.886) 
0.833 
(0.828-0.836) 
0.865 
(0.844-0.883) 
0.770 
(0.750-0.781) 
morphologically, this large a genetic similarity is somewhat unex- 
pected given the presence of the Hart Co. Ridge, an apparent geo- 
logical barrier between these two subspecies. 
Genetic differentiation within and between subspecies was exam- 
ined using F-statistics (Wright, 1978) and a Chi-square contingency 
analysis of heterogeneity (Workman and Niswander, 1970). Allo- 
zyme phenotype frequencies for the 18 populations were used to 
calculate genetic differentiation (i.e., F-statistics) in a hierarchichal 
manner (Wright, 1978). The two hierarchical levels are subspecies 
within species and local populations within subspecies. Since the 
hybrid F population could not be unequivocally assigned to either 
tellkampfi or meridionalis, it was considered as a fifth “subspecies” 
at that level of the hierarchy. Three loci (ALP; GPT-1; MDH-2) are 
variable in some or all local populations of each subspecies. Signifi- 
cant heterogeneity in gene frequencies (Chi-square) was observed 
among N. t. tellkampfi populations at the ALP and MDH-2 loci but 
not at the GPT-1 locus (Table 4). Significant heterogeneity in gene 
frequencies at the GPT-1 locus was observed among local popula- 
tions of viator and among local populations of meridionalis, but no 
differentiation was observed among local populations of either sub- 
species at the ALP or MDH-2 loci (Table 4). No heterogeneity in 
gene frequency was observed among henroti populations at any of 
