1986] 
Kane & Brunner — Neaphaenops tellkampfi 
233 
Figure 1. Map of west central Kentucky showing locations sampled for Nea- 
phaenops tellkampfi in this study. Taxonomic designations of populations at these 
sites (after Barr, 1979b) are as follows: N. t. henroti: BL; CW; SS; T , N. t. meridionalis: 
H; OS; ST; N. t. tellkampfi: B; BH; GO; HA; LB; P; RB; WH; N. t. viator: C; CB; S; 
N. t. meridionalis X N. t. tellkampfi hybrid: F. 
cussed previously have been done, is distributed in the central 
portion of the range to include the caves of Mammoth Cave 
National Park. Neaphaenops t. meridionalis, the southern subspe- 
cies, is limited to the north by the noncavernous sandstones near the 
Barren River. However, two populations are known in the south- 
eastern part of the range which are morphologically intermediate 
between nominate tellkampfi and meridionalis for six of nine diag- 
nostic characters, suggesting a narrow zone of hybridization 
between the two subspecies. Barr (1979b) points out, however, that 
despite the limited gene flow, meridionalis is morphologically the 
most distinct of the four subspecies. Morphological evidence (Barr, 
1979b) suggests a broad zone of hybridization between nominate 
tellkampfi and the eastern subspecies N. t. viator, with gradual 
intergradation between the two subspecies over approximately an 
