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\"1970:197, 198, 199; Reddell, 1971b:50; Hiither,1975:287.Acherontides atoyacence: Delamare Deboutteville,1948b:49, 55; Thibaud, 1963:288, 295-296,fig. 3C (erroneous spelling).Type.locaIity.-Cueva (ooGrutas) de Atoyac, Atoyac,Veracruz, Mexico.Distribution.-Known only from the type-locality.See Fig. 65.Discussion.-The genus Acherontides includesseven species, of which the two troglobites listed hereare the only Mexican species. The other five speciesare known from Rumania, Japan, and Afghanistan.Acherontides atoyacense is eyeless and pigmentless.Acherontides potosinus BonetAcherontides potosinus Bonet, 1946b:52, 53-57, 62,fig. 1-2; Delamare Deboutteville, 1948b:49, 55;Bonet, 1953a:23, 24, 30, 33, 41, 48, 54, 55, 71,72,85,86; Stach, 1959:434; Nicholas, 1962:179;Thibaud, 1963:288; Salmon, 1964:189; Reddell,1967d:l06; Gruia, 1970:197, 198, 199; Moller,1970:5; Reddell, 1971b:50; Hiither, 1975:286,287.'\ , ,'- "-\)\"- '- I\)-/'\'I\\\-~" 1" \~ "-').1 I \,'l.~./MEXICO-,GUATEMALAII, ItII• I,,­'-....'\i....,t," I_._.ll_r....·1/.//r\rr­~IIIiIiFig. 65.-Distribution of troglobitic and troglophilic collembolans of the family Hypogastruridae: 1, Acherontiella sabina;2, Acherontides potosinus; 3, Acherontides atoyacense.199