Revision of Trechus 
75 
result in a lobed base. The five specimens of the type series, all males, 
were collected from beneath stones in wet mud. No other Trechus species 
were found in the immediate vicinity, nor has T. nantahalae yet been found 
elsewhere in the Nantahala Mountains. In fact, the limited collections 
thus far made of Trechus in the Nantahala and Tusquitee/Valley River 
mountains suggest that the somewhat lower elevations along the crest and 
the absence of spruce-fir forest provide a restricted number of suitable 
microhabitats in contrast to the Great Smokies, Great Balsams, and Plott 
Balsams. Of the four endemic taxa known at the present time only T. 
luculentus wayahensis and T. tusquitee have been taken together (on Tus- 
quitee Bald), in contrast to many syntopic species pairs known from the 
other ranges mentioned. 
ACKNOWLEDGMENTS. — This study was supported in part by 
grants from the National Science Foundation (G-12968 and GB-5521 to 
me, and through a grant-in-aid from the Highlands Biological Station, 
GB-2496), the Theodore Roosevelt Memorial Fund, and the American 
Philosophical Society (Penrose Fund No. 6180). 
LITERATURE CITED 
Barr, Thomas C., Jr. 1962. The genus Trechus (Coleoptera: Carabidae: Trechini) 
in the southern Appalachians. Coleopt. Bull. 76:65-92. 
1969. Evolution of the Carabidae (Coleoptera) in the southern Ap- 
palachians. pp 67-92 in Holt, Perry C. (ed.). The distributional history of the 
biota of the southern Appalachians, Part I: Invertebrates. Res. Div. Monogr. 
1, Va. Polytech. Inst., Blacksburg. 295 pp. 
Casey, Thomas L. 1918. Observations on the American Pogoninae, including 
Trechus. Memoirs on the Coleoptera, vol. 8: 394-412. Privately printed, Lan- 
caster, Pennsylvania. 
Emerson, Alfred E. 1945. Taxonomic categories and population genetics. En- 
tomol. News 56: 14-19. 
Horn, George H. 1883. Miscellaneous notes and short studies of North American 
Coleoptera. Trans. Am. Entomol. Soc. 10: 269-312. 
Jeannel, Rene. 1927. Monographic des Trechinae. Morphologie comparee et dis- 
tribution geographique d’un groupe de Coleopteres (2 e livraison). L’Abeille 
33: 1-592. " 
1931. Revision des Trechinae de l’Amerique du Nord. Arch Zool. exp. 
gen., 77:403-499. 
Schaeffer, Charles. 1901. Synopsis of the species of Trechus , with the description of 
a new species. Bull. Am. Mus. Nat. Hist. 14: 209-212. 
Accepted 22 August 1979 
