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ground dwelling habit, many beetles are washed intocaves with organic debris; most of these constitute inno way a part of the true cave fauna.Suborder AdephagaFamily CarabidaeThe family Carabidae is naturally the largest contributorto the beetle fauna of Mexican caves, as it isin most of the world. More than 70 species have beenidentified from the caves in this region, of which 17are troglobites and discussed below. Many of the carabidgenera of significance to the cavernicole ecologyare in serious need of revision, and identifications arenot presently possible. Agonum, Amara, Anisotarsus,Apenes, Ardistomis, Bembidion, Clivina, Platynus,Schizogenius, Selenophorus, and Taehys are all frequentlycollected in caves. A few species in some ofthese and in a few other genera have been identifiedand are briefly discussed here.Among the agonine carabids collected in Mexicancaves are many species of Platynus (s. lat.). Most ofthese remain unidentified, but several are known.Platynus aeuminatus (Chevrolat) has been found incaves in San Luis Potosi and Queretaro; P. melanoenemis(Chaudoir) has been collected in Cueva dePuente Fierro, Oaxaca; P. segregatus (Bates) has beenfound in Grutas de Juxtlahuaca, Guerrero; and P.strictieollis (Bates) has been taken in Sotano de Tlamaya,San Luis Potosi. Platynus eolibor Whitehead(=Colpodes bie%r Chaudoir) is a distinctive speciesknown from several caves in Chiapas and Guerrero.Platynus (Stenoplatynus) umbripennis (Casey) is atroglophile in caves in the states of Guerrero and Mexico(Bolivar and Hendrichs, 1965; Barr et al., 1968).Many species of the genus Rhadine are known astroglobites in the caves of Central Texas (Barr, 1974),but all of the known Mexican cavernicole species aretroglophiles. Rhadine araizai araizai (Bolivar) was describedfrom Grutas del Palmito, Nuevo Leon (Bolivar,1944). It has since been found in Cueva del Pedregoso,Coahuila. A possible new subspecies of R.araizai has been collected from Cueva de los Lagos,Coahuila. Bolivar and Hendrichs (1964) describedfour species of Rhadine from Mexican caves. Rhadinemedellini is known only from Cueva de Carnicero,San Luis Potosi. Rhadine rotgeri was described fromGruta de Cuevacillas, Coahuila; it has recently beencollected in Cueva Abaja de Carreterra, Tamaulipas,and Sumidero de Matehuala, San Luis Potosi. Twospecies assigned to Rhadine by Bolivar and Hendrichs(1964) were placed by Whitehead (1973) inthe genus Platynus. One of these, Platynus boneti,is known only from Cueva de la Boca, Nuevo Leon;the other, P. pelaezi, is known only from Grutas deVilla de Garcia, Nuevo Leon. An undescribed speciesof Rhadine is known only from Sumidero 552, SanLuis Potosi. See Fig. 76 for localities from whichMexican cavernicole Rhadine are known.Among other carabids identified from Mexicancaves are Apenes obseura Chaudoir from Bee Cave,Tamaulipas; JlrJasoreus sp. from Grutas de Xtacumbilxunam,Campeche; Tachys (Taehys) proximusSay from Cueva de los Lagos, Coahuila; T. (Tachyuralunistriatus (Bilimek) from Grutas de Cacahuamilpa,Guerrero, and Grutas de la Estrella, Mexico;and an undescribed species of Pterostichus (Ithyto­Ius) from caves in the Sierra de El Abra, San LuisPotosi (see Fig. 77). Paehyteles urrutiai Bolivar isan unusual species known only from caves in theSierra de El Abra, San Luis Potosi and Tamaulipas(Bolivar, 1952) (see Fig. 77).The remaining genera of cavernicole carabids areall represented by troglobites and are discussed indetail below.Antroforceps bolivari BarrAntroforeeps bolivari Barr, 1967a:66-70, fig. 1; Reddell,1971b:60; Reddell and Mitchell, 1971b:193;Whitehead, 1972:196-197; Reddell, 1973a:35, 41;Table 26.-Summary of cave inhabiting Coleoptera.TroglobitesOther SpeciesArchostomataMicromalthidae 0 1AdephagaCarabidae 17 56Dytiscidae 0 7Gyrinidae 0 1PolyphagaAderidae 0 1Alleculidae 0 3Anthicidae 0 1Bruchidae 0 2Cantharidae 0 2Chrysomelidae 0 6Cleridae 0 1Coccinellidae 0 3Colydiidae 0 1Curculionidae 0 2Dascyllidae 0 1Dermestidae 0 3Dryopidae 0 1Elateridae 0 4Elmidae 0 1Endomychidae 0 2Euglenidae 0 1Helodidae 0 1Histeridae 4 14Hydrobiidae 0 1Hydrophilidae 0 5218