1986] 
Barr — Subterranean beetle 
49 
in Floyd County, eastern Kentucky. The mine portal, designated 
“D-104” in MacGregor’s notes, is located at Bosco (= Hueysville), 
about 22 km SSW Prestonsburg. The beetles were found in a muddy 
spot on the mine floor under rocks. 
These two females are identical with females of Pseudanophthal- 
mus hypolithos (Barr, 1981: 83, figs. 28, 34), a species previously 
known only from Old Quarry Cave, in Pine Mountain, near Ash- 
camp, Pike County, Kentucky, 45 km SE of the Bosco mine. The 
hypolithos group, which includes 4 species from Pine Mountain, 
KY, and a single species (P. praetermissus) near the base of Cumber- 
land Mountain in Scott County, VA, belongs to the engelhardti 
complex, a group of 55 largely Appalachian valley species arranged 
in 7 species groups (Barr, 1981). Pseudanophthalmus hypolithos, 
itself, is distinguished from other species of the group by quite deep 
elytral striae and convex elytral intervals, greatly reduced pubes- 
cence limited chiefly to sparse and very short rows on each elytral 
interval, and falciform aedeagal apex. The aedeagal character could 
not be checked, but based on my experience with species of the 
genus, the absence of non-genitalic differences is decisive; only 
2/240 species are determined solely on male genitalic characters. 
Previously I had considered Pine Mountain as a “karst island” 
within the Allegheny plateau; it is a fault block about 125 km long, 
extending from Elkhorn City, Kentucky, southwest to Campbell 
County, Tennessee, with a band of Newman limestone (Mississip- 
pi) exposed on its northwest face. To the extent that “troglobitic” 
Pseudanophthalmus species are collectable within the caves of Pine 
Mountain, this is still true after a fashion, but the discovery of P. 
hypolithos in a coal mine indicates that “caves” are a somewhat 
artificial concept in terranes where highly fractured rocks (shales, 
coals, conglomerates) exist, and that “troglobitic” trechines may 
occur over a wider area than is strictly delimited by karst terrane. 
The Bosco mine offers another sort of entry into the deep soil com- 
munity, and the discovery of P. hypolithos there is a strong impetus 
to search for other edaphobitic trechines within the interior of the 
Allegheny plateau. 
Acknowledgements 
I thank John R. MacGregor for making these specimens available 
for study. This paper was supported in part by NSF DEB-8202339. 
