58 
Thomas C. Barr, Jr. 
anterior margin. Pronotum a little transverse, 0.8 as long as wide, ante- 
rior angles and secondary basal angles less prominent than in P. tennes- 
seensis, margins feebly and briefly sinuate before small, obtuse, but sharp 
and slightly reflexed hind angles. Elytra 1.6 times longer than wide; in 
contrast to P. tennesseensis prehumeral borders slightly oblique to mid- 
line, disc a little more convex, sides slightly rounded, pubescence sparser 
and confined to rows on intervals; striae shallow, somewhat irregular, 
only inner 4 complete. Aedeagus short and thick, 0.55 mm long in holo- 
type, basal bulb bent at right angle to less arcuate median lobe, apex very 
briefly produced and finely knobbed. Female unknown. 
Type series. — Holotype male (American Museum of Natural His- 
tory), Wright Cave, Union Co., Tennessee, 31 December 1963, R. M. 
Norton; male paratype, same cave and collector, 6 January 1965; male 
paratype. Wolf Cave, Union Co., Tennessee, 22 August 1972, J. R. Hol- 
singer and D. C. Culver. Both caves were described and located by Barr 
(1961). 
Measurements (mm). — Holotype, total length 4.10, head 0.88 long X 
0.71 wide, pronotum 0.71 long X 0.86 wide, elytra 2.31 long X 1.35 wide, 
antenna 2.77 long, aedeagus 0.55 long. 
Discussion. — The species is known only from two caves 2.3 km apart, 
both on the north side of Clinch River in the “Peninsula” (the interfluve 
between Clinch and Powell rivers). The principal barrier between the 
ranges of P. unionis and P. paynei is apparently the Clinch River. 
Although P. pusillus and P. unionis are on the same side of Clinch 
River, they are separated by Powell River and are in different strike 
bands of limestone. 
hirsutus group 
Aedeagus weakly arcuate, not constricted before apex, which is 
bluntly rounded or very feebly knobbed; copulatory sclerites very small, 
especially left piece. Length 3. 1-4.5 mm, mean lengths about 3. 7-4.2 mm. 
Form slender and depressed, pronotum transverse-cordiform with 2-4 
long setae each side of disc, elytra more or less subparallel. Type spe- 
cies: P. hirsutus Valentine. 
Distribution. — Lee and Scott cos., VA; Hamilton, Marion, and Mon- 
roe cos., TN; Dade Co., GA; Dekalb Co., AL. 
Pseudanophthalmus hirsutus Valentine 
Fig. 20 
Valentine 1931:252. Barr 1965:46 (in part). 
Length 4.0-4.5, mean 4.2 ± SD 0.2mm (N = 6). Head longer than wide; 
pronotum sides convergent to obtuse hind angles, anterior angles rather 
prominent; disc with 3 long setae each side; elytra elongate-subparallel. 
