66 
Thomas C. Barr, Jr. 
indistinct scales; parameres slender and elongate, apexes with four setae 
each and not obliquely truncate as in T. valentinei. 
Type series . — Holotype male (AMNH), a unique, in mossy rocks at 
edge of Ramsay Prong, about 150 yards (135 m) above Ramsay 
Cascades, elevation 4600 feet (1400 m), Sevier County, Tennessee, in 
Great Smoky Mountains National Park, 25 May 1969, T. C. Barr. 
Measurements (in mm). — Holotype male: total length 3.29, head 0.74 
long X 0.60 wide, pronotum 0.62 long X 0.83 wide, elytra 1.85 long X 
1.28 wide, antenna 1.39 long, aedeagus 0.78 long. 
Distribution. — Known only from the type locality. 
Discussion . — Efforts to obtain additional specimens of this distinctive 
species have been unsuccessful. Trechus nebulosus, T. valentinei , and T. 
bowlingi were collected in the same microenvironment along Ramsay 
Prong, but even these otherwise common species are relatively rare at the 
site. 
Trechus (Microtrechus) novaculosus Barr 
Fig. 44 
Barr 1962:89, Fig. 27. Type locality, Clingmans Dome, Sevier County, 
Tennessee; type deposited in USNM. 
This large species, confined to the spruce-fir forests of the central Great 
Smoky Mountains, is the largest species of Trechus in the Smokies. The 
usual size range in the vicinity of Clingmans Dome is 4.4-4. 8, mean 4.6 
mm, but J. Manson Valentine took three very large specimens, fully 5.5 
mm long, on Mt. FeConte in May 1934. Seventeen specimens from Mt. 
Kephart and along Anakeesta Ridge, which connects Mt. FeConte with 
the main crest of the Smokies, are intermediate in length, 5. 1-5.5, mean 
5.2 mm; these beetles, which I collected in August 1975, occurred several 
inches below the surface of wet scree piles along the trails. 
The aedeagus of Clingmans Dome area specimens, 1.22-1.24 mm long, 
is smaller than the 1.23-1.32 mm length range seen in the Mt. FeConte- 
Anakeesta Ridge material, but the basic pattern is identical: rather 
strongly arcuate in lateral view, the median lobe sharply bent near the 
middle and produced and attenuate at the apex; in dorsal view the apex is 
simple and broadly spatulate. The copulatory sclerites are simple, 
spatulate, quite elongate and narrow, almost razor-like in shape. 
From other species of the nebulosus group in the Smokies, T. novaculosus 
is readily distinguished by large size, small eyes, convergent (i.e., non- 
sinuate) pronotum sides, and large, obtuse hind angles. I found it only 
