1966] 
Barr — Mexisphodrus 
1 15 
Comparative measurements of the holotypes of the three known 
species of Mexisphodrus are given in the accompanying table. The 
three species may be separated by the following key. 
Key to Known Species of Mexisphodrus 
1 Eyes small and flat, their diameter less than length of scape; 
pronotum elongate, the sides only feebly rounded; color uni- 
formly rufotestaceous or f errugineous ; metathoracic wings 
vestigial 2 
Eyes large and convex, their diameter greater than length of 
scape; pronotum distinctly wider than long, sides conspic- 
uously rounded; head and pronotum rufocastaneous, elytra 
darker, shining; metathoracic wings functional; San Luis 
Potosi M. tlamayaensis Barr, n. sp. 
2 Size larger (16-18 mm); aedeagus larger (3.3 mm); apices of 
elytra individually acuminate, dehiscent; elytral disc dull 
shining, microsculpture rather coarsely isodiametric, gran- 
ular; Veracruz M. veraecrucis Barr 
Size smaller (12-13 mm); aedeagus smaller (2.1 mm); apices 
of elytra individually rounded; elytral disc polished shining, 
microsculpture a transverse meshwork; Tamaulipas 
M. profundus Barr n. sp. 
Literature Cited 
Barr, Thomas C., Jr. 
1965. A new cavernicolous sphodrine from Veracruz. Mexico (Coleop- 
tera: Carabidae). Coleopt. Bull., 19(3): 65-72. 
Bell, Bill, and Terry Raines. 
1965. The exploration of Sotano de Tlamaya. Nat. Speleol. Soc. News, 
23 (5) : 62-65. 
Straneo, S. L. 
1957. Due nuovi carabidi del Messico (Col. Carab.). Ciencia (Mex.), 
17(4-6) : 81-84. 
