56 
Thomas C. Barr, Jr. 
Pseudanophthalmus pusillus, new species 
Figs. 4, 13 
Etymology . — Latin pusillus, “very little.” 
Diagnosis. — Closely similar to P. tennesseensis, differing in the much 
less prominent anterior angles of the pronotum, less subparallel form of 
the elytra, less dense pubescence, and smaller aedeagus. 
Description. — Length 3. 7-3.9, mean 3.8 ± SD 0. 1 mm. Closely similar 
to P. tennesseensis, differing as follows: Head a little longer than wide, 
labrum margin without median lobe; pronotum with anterior angles 
subdued, hind angles more sharply reflexed; elytra with less prominent 
humeri, margins more arcuate (less subparallel), striae feebler, pubes- 
cence less dense. Aedeagus smaller, 0.56-0.57 mm long, basal bulb much 
less sharply reflexed, apex a little more attenuate and apical knob slightly 
larger. 
Type series. — Holotype male (American Museum of Natural History) 
and one female paratype, Martin Cave, 7.2 km SW Clinton beside 
Southern Railroad tracks, Anderson Co., Tennessee, 23 November 1963, 
R. M. Norton; two male paratypes, same cave, 5 January 1966, R. M. 
Norton. 
Measurements (mm). — Holotype, total length 3.67, head 0.74 long X 
0.67 wide, pronotum 0.74 long X 0.76 wide, elytra 2.06 long X 1.23 wide, 
antenna 2.43, aedeagus 0.57. 
Discussion. — P. pusillus is a vicar species of P. tennesseensis, from 
which it is geographically separated by the Copper Creek fault. It occu- 
pies caves in Ordovician limestones on the west (right) side of Clinch 
River, and is known only from the type locality. This and the next two 
species share a relatively recent ancestry with P. tennesseensis. 
Pseudanophthalmus paynei, new species 
Fig. 14 
Etymology. — Patronymic honoring Dr. J. A. Payne, discoverer of 
this species. 
Diagnosis. — Closely similar to P. tennesseensis, differing in nonsinu- 
ate, simply convergent sides of pronotum, less prominent humeri, and 
more slender and more produced apex of median lobe of aedeagus with 
less sharply defined terminal knob. 
Description. — Length 3. 6-4. 9, mean 4. 1 ± SD 0.3 mm (N = 13). Head 
about 1.15 longer than wide; labrum trilobed; antenna less than 0.6 body 
length. Pronotum 0.85 as long as wide, greatest width at apical fourth 
behind anterior marginal setae, sides convergent to obtuse hind angles, 
secondary basal angles moderate, 2 long setae either side of disc. Elytra 
1.6 times longer than wide, sides feebly rounded, humeri rather promi- 
