Revision of Trechus 
43 
minutely knobbed in left lateral view. The pronotum is two-thirds as long 
as wide; the elytral disc is slightly flattened in the center, and its inner 
longitudinal striae are more deeply impressed. 
New locality records for T. h. hydropicus are as follows; unlike the very 
general locations given on museum labels of 19th century collections, 
these localities suggest- a distribution encompassing the Blue Ridge and 
western mountains of Virginia, eastern West Virginia, possibly north into 
western Maryland (“Md.” labels must apply to specimens from the 
higher elevations in Maryland). VIRGINIA: Giles County. — Bald Knob 
at Mountain Lake, elevation 4350 ft. (1325 m) (T. C. Barr — restricted 
type locality); Cascades of Little Stony Creek, 2 mi. (3.2 km) nw of above 
locality, elevation 3000 ft. (900 m) (S. B. Peck). Patrick County. — Pin- 
nacles of Dan, along Blue Ridge Parkway near Vesta (R. Hoffman and L. 
Knight). Rockbridge County. — Apple Orchard Mountain (R. Hoffman). 
Tazewell County. — Burkes Garden (R. Hoffman). WEST VIRGINIA; 
Pocahontas County. — Ravine n of Route 39, 4 mi. (6.4 km) nw Mill Point, 
elevation 3500 ft. (1100 m) (T. C. Barr); Falls of Hills Creek, 4 mi. (6.4 
km) nw Lobelia, elevation 3300 ft. (1000 m) (S. B. Peck). 
Trechus ( Trechus ) hydropicus avus Barr, new combination 
Fig. 19 
Trechus beutenmullen avus Barr 1962: 72. Type locality, Grandfather Moun- 
tain, Avery County, North Carolina; type deposited in United States 
National Museum of Natural History (USNM). 
This subspecies is known only from Grandfather Mountain and Three 
Top Mountain (Ashe County), North Carolina. It differs from T. 
hydropicus hydropicus in the slightly longer aedeagus (0.99-1.02), the apex of 
which is more conspicuously knobbed and reflexed. The pronotum is only 
0.6 as long as wide, and the elytral striae are more feebly impressed. 
Trechus h. avus intergrades with T. h. beutenmuellen on Beech Mountain, 
Avery County, North Carolina (see Barr 1962:73). 
Trechus ( Trechus ) hydropicus beutenmuellen Jeannel, new combination 
Fig. 20 
Trechus Beutenmullen Jeannel 1931: 436. Type locality, Mt. Mitchell, Yan- 
cey County, North Carolina; type deposited in Museum National 
d’Histoire Naturelle, Paris (MNP) (not seen). 
Trechus hydropicus: Schaeffer 1901 : 212. Casey 1918:410. Jeannel 1927:191. 
Trechus beutenmullen beutenmullen'. Barr 1962:72. 
This subspecies is abundant at higher elevations from the Black and 
Great Craggy mountains (Buncombe, Yancey, McDowell counties) of 
