90 
Thomas C. Barr, Jr. 
larger species; elytral microsculpture a fine, tranverse meshwork, 
pruinose only in species from Rockcastle, Pulaski, and Wayne counties, 
Kentucky. Labrum doubly emarginate, the median lobe varying from 
weak to moderately prominent. Anterior discal at level of 4th umbilicate; 
apical groove typically short and very rounded, joining 3rd stria at or 
slightly anterior to anterior apical puncture; humeri weakly serrulate or 
not serrulate. Mentum tooth broad, short, emarginate. Mesosternum 
declivous. Last abdominal sternite of males with apical margin entire. 
Aedeagus weakly and evenly arcuate, basal bulb not conspicuously 
enlarged nor deflexed, aedeagal apex usually slender, more or less 
produced, not very attenuate, bluntly rounded at tip; transfer apparatus 
consisting of a single slender, small, elongate-triangular copulatory 
sclerite; parameres rather short, with 4 setae at their apexes. Type species: 
P. cumberlandus Valentine. 
Discussion. — Pseudanophthalmus cumberlandus was placed in the 
pubescens group by Jeannel (1949). Barr (1959) previously relegated 7 
taxa described as polytypic P. tiresias to a section of the engelhardti 
group, where they do not belong; they are small, mostly slender and 
depressed species, but all have the typical cumberlandus group transfer 
apparatus. Further study of the tiresias complex indicates that all 7 taxa 
are full species. 
The group is widely distributed in the Central Basin of Tennessee 
but also extends into north Alabama (Limestone County), western Ken- 
tucky (Christian, Caldwell, and Livingston counties), eastern Kentucky 
(Rockcastle, Pulaski, and Wayne counties), the eastern Highland Rim of 
Tennessee (Coffee County), and the western Highland Rim and western 
valley of the Tennessee River in Tennessee (Montgomery, Dickson, 
Hickman, and Lewis counties). In numbers of species (approximately 30) 
the group exceeds the engelhardti group. The aedeagal form and simple 
copulatory sclerite are highly diagnostic; the single sclerite is probably 
homologous with the left piece of other groups. Some of the component 
species, especially those at the periphery of the group’s collective range, 
are sympatric with species of the pubescens, menetriesi, and simplex 
groups. Some of the species in the southeastern and western parts of Mid- 
dle Tennessee are geographically close to species of the engelhardti group 
(P. loedingi humeralis Valentine and P. hesperus Barr, respectively), but 
no sympatry has been demonstrated. In the case of the sympatric species 
pair P. productus/ P. simplex the body size is approximately the same 
(4. 2-5. 4 mm and 4.2-5. 1 mm respectively), and in the pair P. inquisitor/ P. 
fowlerae the former species is much smaller (3. 1-3.9 vs. 4.0-4. 6 mm, 
respectively). The species of the pubescens and menetriesi groups are in- 
variably conspicuously larger than species of the cumberlandus group 
with which they coexist. 
