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Reddell, 1973a:3S, 41; Vigna Taglianti, 1977:326,333,338.Mexaphaenops new species: Barr, 1968b:183.Mexaphaenops fiski: Erwin et aI., 1977:24 (erroneousspelling).Type-locality.-SmaIl cave in VaIle de los Fantasmas,45 Km east of San Luis Potosi on the highwayto Valles, San Luis Potosi, Mexico.Distribution.-Known only from two caves atVaIle de los Fantasmas, San Luis Potosi. See Fig. 78.Records.-San Luis Potos{, Cave (Valle de los Fantasmas)and Sotano de la Golondrina.Discussion.-Mexaphaenops fishi is probably mostclosely related to M. prietoi. It is known from twocaves at 2,800 meters in elevation. It is interestingthat only two troglobites are known from the Vallede los Fantasmas region and that both are quite rare.It is possible that this area has been too cold and dryat times to support large numbers of species of thelitter-associated fauna which appears to have suppliedmost of the troglobites known from Mexican caves.Mexaphaenops intermedius BarrMexaphaenops intermedius Barr, 1971:113, 115, fig.1-2; Reddell and Mi!Ch.~ll, 1971b:193, fig. 19;GUATEMALA,......;,/r/,./Fig. 77.-Distribution of troglobitic and troglophilic carabid beetles of the genera Tachy., Antroforcep., Mexani/lu., Pochytele.,and Pterostichu.: 1, Tachy. (Tachy.) proximu.; 2,Antroforcep. bolivari; 3, Pachytele. urrutiai; 4,Pachytele. urrutiai andPtero.tichu. (Ithytolus) n.sp.; 5, Ptero.tichu. (Ithytolu.) n. sp.; 6, Tachy. (Tachyura) uniltriatul; 7. Mexani/lu••bordonii.221