Revision of Trechus 
35 
Tennessee vandykei vandykei (Jeannel) 
Pronotum sides more oblique, hind angles a little obtuse (Fig. 7); 
aedeagus (Fig. 26) slightly smaller, 0.45-0.49 mm, more arcuate; Great 
Balsams, Pisgah Ledge, and Cowee Mountains, North Carolina 
vandykei pisgahensis, new subspecies 
27(13). Eyes small and subconvex to flat, their short diameter 2/3 to 3/4 length 
of scape 28 
Eyes large and convex, their short diameter subequal to scape length, 
or greater than scape length 35 
28(27). Sides of pronotum distinctly sinuate before hind angles 29 
Sides of pronotum not sinuate, or very briefly and almost imperceptibly 
sinuate 31 
29(28). Hind angles more or less right, apical recurrent groove long, joining or 
directed toward 5th stria far in advance of anterior apical puncture . . . 
( tennesseensis ) 30 
Hind angles obtuse (Figs. 17, 45); apical recurrent groove joining 5th stria 
a short distance in advance of anterior apical puncture; Nantahala 
Mountains, North Carolina nantahalae , new species 
30(29). Clypeus with pair of oblique striae internal to clypeofrontal grooves; caves 
in Roane County, Tennessee tennesseensis tennesseensis Barr 
Clypeus without oblique striae internal to clypeofrontal grooves; caves 
and lowland forests in Great Smoky Mountains, Tennessee 
tennesseensis tauncus Barr 
31(28). Apical recurrent groove short, joining 5th stria at level of anterior apical 
puncture; pronotum sides very feebly sinuate or not sinuate before hind 
angles; hind angles small; elytra with 3 to 5 striae 32 
Apical recurrent groove long, joining 5th stria well in advance of anterior 
apical puncture; pronotum sides not sinuate, hind angles large, blunt, 
obtuse (Fig. 44); elytra usually with 5 striae; spruce-fir forests in central 
Great Smoky Mountains, North Carolina-Tennessee . novaculosus Barr 
32(31). Elytra with 3 to 6 striae, but at most only 4 striae well impressed; 
pronotum as in Figs. 11, 12; apex of aedeagus produced, knobbed, or 
hooked; spruce-fir forest in Great Smoky Mountains 33 
Elytra with at least 5 well impressed striae; pronotum as in Fig. 16; apex 
of aedeagus broad, finely reflexed only at tip; caves in Tuckaleechee 
Cove, Blount County, Tennessee tuckaleechee Barr 
33(32). Pronotum (Fig. 1 1 ) sides scarcely or not sinuate; usually at least 5 or 6 
striae visible, though only inner 2 to 4 are well impressed; aedeagus 
0.92-1 .02 mm long 34 
Pronotum (Fig. 12) sides finely sinuate immediately before the small, 
right, hind angles; inner 2 elytral striae complete but lightly impressed, 
3rd stria shallower, 4th evanescent; aedeagus (Fig. 38) 0.77 mm long 
(unique holotype), apex produced and reflexed at tip; known only from 
Ramsay Cascades area, Great Smoky Mountains, Tennessee 
stupkai, new species 
34(33). Elytra usually with only inner 2 striae well impressed, although striae 3 
through 5 usually discernible as progressively obsolescent traces; 
aedeagus (Fig. 37) slender and elongate, apex gradually attenuate and 
hooked at tip, parameres slender, with 4 apical setae; eastern Great 
Smoky Mountains verus Barr 
