1986] 
Kane & Brunner— Neaphaenops tellkampfi 
245 
i/d 
Figure 3. Conditional allele frequencies (p(i)) as a function of their incidence 
(i/d) in four taxa of cave-dwelling organisms. Three qualitative patterns of gene flow 
are inferred: low gene flow: Neaphaenops tellkampfi (filled circles) and Ptomaphagus 
hirtus [open circles (data from Laing et al., 1976)]; intermediate gene flow: Hadenoe- 
cus subterraneus [triangles (data from Caccone, 1985)]; and, high gene flow: Nea- 
phaenops tellkampfi tellkampfi (squares). 
