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Type-Iocality.-Sotano de Tejamanil, 4.5 Km westof Pinal de Amoles, Queretaro, Mexico.Distribution.-Known from three caves in Queretaro.See Fig. 78.New records.-Queretaro: Sotano de la Escuelaand Cueva del Judio (det. T. C. Barr, Jr.).Discussion.-The genus Mexaphaenops is knownonly from caves at comparatively high elevations. Inaddition to the four species listed here, three speciesfrom Tamaulipas and Nuevo Leon await description.Barr (1967c) postulates that the genus has evolvedfrom a Paratrechus-like ancestor. Mexaphaenops eleganshas been taken from flows tone and from rottenwood. It was rather abundant among the debris leftfrom a campfire built in Cueva del Judio.Mexaphaenops fishi BarrTrechine (part): Barr, 1967a:66.Mexaphaenops fishi Barr, 1967d:162-164, 165, fig. 3,6; Barr, 1971:115-116; Laneyrie, 1971:192; Reddell,1971b:61; Vigna Taglianti, 1972:118, 126,127, fig. 5; Elliott and Reddell, 1973:192, 197;GUATEMALA///r\r~ ..-"Fig. 76.-Distribution of troglobitic and troglophilic carabid beetles of the genera Rhadine, Platynus, and Speocolpodes:I, Rhadine araizai; 2, R. pelaezi; 3, Platynus boneti; 4, R. rotgeri; 5, P. medellini; 6, Platynus (Merisphodrus) n. sp. 1;7, P. (M.) profundus; 8, Platynus (Merisphodros) n. sp. 2; 9, P. tlamayaensis and Platynus (Merisphodros) n. sp. 3; 10, Platynus(Merisphodros) n. sp. 3; 11, P. (M.) gertschi; 12, Platynw (Merisphodros) n. spp. 4-5; 13,P. (M.) veraecrocis; 14,P. (M.)urquijoi; 15,P. (Stenoplatynus) umbripennis; 16, Speocolpodes franiai.220