Revision of Trechus 
33 
10(9). Pronotum (Fig. 4) sides feebly sinuate before obtuse hind angles; aedeagus 
apex slender, attenuate, tipped with more or less rounded knob 
schwarzi scopulosus, new subspecies 
Pronotum sides very briefly but distinctly sinuate before very small, right 
hind angles; aedeagus apex not attenuate, tipped with knob bearing 
sharp ventral cusp mitchellensis Barr 
1 1 (8). Larger, 3. 8-4. 4 mm; pronotum (Fig. 3) a little less transverse, sides 
shallowly sinuate before hind angles; aedeagus (Fig. 23) 1.31-1.39 mm 
long; Mt. Pisgah area, Buncombe, Haywood, and Transylvania 
counties, North Carolina schwarzi schwarzi Jeannel 
Smaller, 3. 4-3,6 mm; pronotum (Fig. 5) more transverse, sides more deeply 
sinuate before hind angles; aedeagus (Fig. 24) 1.08-1.16 mm long; gorge 
of North Pacolet River, Polk County, North Carolina 
schwarzi saludae, new subspecies 
12(1 ). Aedeagus with apex rounded, slightly knobbed, or briefly reflexed; AND/ 
OR internal sac without large, sharp scales which obscure transfer 
apparatus 13 
Aedeagus (Figs. 32-35) with apex conspicuously reflexed and hooked; 
internal sac armed with many large, sharp scales which obscure 
transfer apparatus; smaller species, 2. 7-3. 9 mm .... {uncifer group) 15 
13(12). Aedeagus (Figs. 25-31 ) with apex gradually attenuate, rounded or slightly 
knobbed at tip; transfer apparatus not obscured by scales, consisting of 
two lamellar copulatory sclerites, left small and triangular, right larger 
and apically rounded; smaller species 2. 4-3. 3 mm long, aedeagus 0.43- 
0.92 mm (vandykei group) 20 
Aedeagus (Figs. 36-43) with apex broad, very briefly narrowed and slightly 
reflexed at tip; transfer apparatus of heavily sclerotized copulatory 
pieces, variable in structure but usually not as described above; medium 
to large species, 3.3-5. 5 mm long, aedeagus 0.63-1.27 mm long 
( nebulosus group) 27 
14(12). Pronotum with sides not sinuate before hind angles, which are always 
obtuse 15 
Pronotum with sides at least feebly sinuate in basal tenth, hind angles 
obtuse or less than obtuse; aedeagus as in Figs. 32-35 .... (aduncus) 17 
15(14). Elytra with 3 inner longitudinal striae clearly impressed; aedeagus about 
0.9-1 .5 mm long, apex greatly produced and slender 16 
Elytra with at least 5 clearly impressed striae, disc rather depressed; 
aedeagus about 0.7 mm long, apex briefly attenuate and produced; 
Unicoi Mountains, North Carolina-Tennessee talequah Barr 
16(15). Length 2. 7-3. 2 mm; aedeagus arcuate, apex abruptly narrowed and 
produced, 0.88-1 .03 mm long; Great Smoky and Plott Balsam 
mountains, North Carolina-Tennessee uncifer Barr 
Length 3.2-3. 5 mm; aedeagus very long (1.47-1.49 mm) and straight, apex 
greatly produced and not deflexed; Great Balsam Mountains, North 
Carolina satanicus Barr 
17(14). Elytra with two clearly impressed inner striae, 3rd and 4th striae (if 
present) very shallow; Great Balsam Mountains and associated spurs, 
North Carolina 18 
Elytra with 5, rarely 4 or 6 striae; Cowee and Nantahala mountains, 
North Carolina 19 
