Appalachian Pseudanophthalmus 
57 
nent but not sharply angular (as in P. tennesseensis), prehumeral borders 
slightly oblique, disc a little depressed; 5 or more shallowly impressed 
longitudinal striae, intervals flat or feebly convex, apical groove rather 
short, bisinuate, running to 3rd stria at level of 8th umbilicate puncture, 
without crosier. Aedeagus of paratype 0.63 mm long, arcuate, apex grad- 
ually attenuate and very finely truncate, median lobe more slender and 
apical knob less pronounced than in P. tennesseensis. Apex thicker and 
less abruptly attenuate and apical knob less pronounced than in P.pusil- 
lus or P. unionis. 
Type series. — Holotype male (American Museum of Natural His- 
tory), 1 male, and 7 female paratypes, Moores Bridge Cave, 1.3 km N 
Clinton on east (left) side of Clinch River, Anderson Co., Tennessee 
(Norris IV 2 ' Quadrangle, 36°0736" X 84°06'55"), 4 July 1967, R. M. 
Norton; one male and 2 female paratypes same cave, 22 July 1965, J. A. 
Payne. 
Measurements (mm). — Holotype, total length 4.10, head 0.84 long X 
0.73 wide, pronotum 0.75 long X 0.88 wide, elytra 2.08 long X 1.33 wide, 
antenna 2.30 long. 
Discussion. — The type locality cave lies a short distance upstream 
from the old Moores Bridge across Clinch River, just north of Clinton on 
the Norris road (Tennessee Route 61). A steep descent of 45 m opens into 
a strike gallery 9 to 15 m wide and 180 m long, with high, irregular ceiling 
and damp floor. Beetles occurred about “200 ft. from entrance under 
rotten log and stones” (Payne) and near the foot of the entrance drop on 
“damp . . . floor with rotting wood” (Norton). This species is quite close 
to P. tennesseensis, differing primarily in the convergent sides of the 
pronotum, slightly less angular humeri and more rounded sides of the 
elytra, and the slightly more arcuate and apically less sharply knobbed 
aedeagus. One specimen of this species was collected by R. M. Norton in 
Flowstone Cave (Anderson County Park) and one specimen in Norris 
Quarry Cave No. 2; both caves are near Norris, in Anderson County, 
10-12 km northeast of Moores Bridge Cave. 
Pseudanophthalmus unionis, new species 
Fig. 15 
Etymology . — Geographic place name, from Union County, Tennessee. 
Diagnosis. — Closely similar to the preceding three species, differing in 
the sparser pubescence of the elytral disc, oblique prehumeral borders, 
less prominent anterior angles of pronotum, less subparallel elytra, and 
shorter and thicker aedeagus. 
Description. — Length 3. 7-4. 2, mean 4.0 mm (N = 3). Head one-sixth 
longer than wide, sides feebly rounded; labrum with low median lobe in 
