Revision of Trechus 
65 
Trechus ( Microtrechus) verus Barr 
Fig. 37 
Barr 1962:81. Type locality, Mt. Sterling, Haywood County, North 
Carolina; type deposited in USNM. 
When describing T. verus I placed it in the uncifer group, where it is 
readily distinguished by its large size and the absence of heavy, scaly ar- 
mature on the internal sac. Both characters, so highly diagnostic in the 
uncifer group, are not at all out of the ordinary in the nebulosus group, 
where it more properly belongs alongside the closely similar species T. 
valentinei , with which I had earlier confused it. True T. verus is confined to 
the eastern end of the Smokies in Haywood County, North Carolina, and 
Cocke County, Tennessee, where it has been taken on Mt. Sterling, Old 
Black, and Cataloochee Balsam. Like T. valentinei , which it resembles, T. 
verus has small eyes and pale coloration and commonly occurs beneath 
rocks in wet places. The aedeagus of T. verus is more slender than that of 
T. valentinei , the apex is more conspicuously reflexed and not twisted to 
the left, and the parameres are styliform. 
Trechus ( Microtrechus ) stupkai , new species 
Figs. 12, 38 
Etymology. — Patronymic honoring Mr. Arthur Stupka, former Park 
Naturalist and Research Biologist, National Park Service. 
Diagnosis. — Eye diameter less than scape length; pronotum with apex 
and base widths subequal, sides briefly sinuate before small, right, hind 
angles; aedeagal apex briefly produced straight back, truncate at tip. 
Description. — Length of unique holotype 3.3 mm. Form moderately 
robust and subconvex; dark piceous, appendages all pale. Head one 
fourth longer than wide; labrum evenly emarginate; eye diameter less 
than length of scape. Pronotum three fourths as long as wide, apex and 
base subequal, about 0.7 greatest width, which occurs in apical third; 
sides rounded apical two thirds, then convergent, shallowly but distinctly 
sinuate before small, about right, hind angles. Elytra 1.4 times longer 
than wide, oval, subconvex, inner two striae moderately impressed, third 
feebly impressed, fourth stria present only as evanescent trace; apical 
groove wide and short, ending slightly in advance of anterior apical 
puncture. Aedeagus of holotype 0.78 mm, basal bulb large and bent at 
right angles to median lobe, apex rather abruptly produced straight back 
and truncate with terminal button; copulatory pieces elongate-lobulate, 
left three fourths as long as right, internal sac weakly armed with small, 
