Revision of Trechus 
59 
Trechus (Microtrechus) aduncus toxawayi , new subspecies 
Fig. 33 
Etymology . — From Toxaway Mountain, the type locality. 
Description . — Length 3.2-3. 3 mm. Elytra with three inner striae clearly 
impressed, at best a trace of fourth stria; elytra rather slender, elongate- 
oval. Aedeagus slender, 0.91-0.97 mm long, less arcuate than in the other 
subspecies of T. aduncus , apex slender and produced more than in 
nominate aduncus , terminating in reflexed hook. 
Type series . — Holotype male (AMNH), two male and one female 
paratypes, 0.25 mile (0.4 km) west of the summit of Toxaway Mountain, 
elevation 4600 feet (1400 m), Jackson County, North Carolina, 24 June 
1970, T. C. Barr, Jr., and T. C. Barr, III. 
Measurements (in mm). — Holotype male: total length 3.25, head 0.62 
long X 0.68 wide, pronotum 0.66 long X 0.89 wide, elytra 1.89 long X 
1.31 wide, antenna 1.57 long. 
Distribution . — Known only from the type locality, at the end of a divide 
(Tanasee Ridge) which extends 17 miles (27 km) south from the crest of 
the Great Balsams. The ridge possibly permits continuity between T. a. 
toxawayi and nominate aduncus , but no intermediate populations are 
known. 
Discussion. — The type series was collected from beneath a mat of 
decaying leaves at the base of a low, sloping rock cliff, thus from very 
typical T. aduncus microhabitat. Trechus barben was the only other species 
of the genus taken on Toxaway Mountain. 
Trechus ( Microtrechus ) aduncus coweensis new subspecies 
Fig. 34 
Etymology. — From Cowee Mountains, where the type locality is 
situated. 
Description . — Length 3. 4-3. 8, mean 3.7 mm. Elytra with at least five 
visible striae, inner three striae more deeply impressed. Aedeagus 0.84 
mm long in paratype, median lobe thicker than in T. a. aduncus or T. a. 
toxawayi , apex slender, produced, slightly recurved, terminal hook knob- 
like. 
Type series . — Holotype male (AMNH), three male and one female 
paratypes, summit of Yellow Mountain, elevation 5000 feet (1525 m), 4 
miles (6.4 km) southwest of Glenville, Macon-Jackson counties, North 
Carolina, 28 June 1969, T. C. Barr. 
