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1955:40, 60, 62, 64, 170, 187; Padt, 1957:33;Nicholas, 1962:180; Reddell, 1971b:48; Conde,1975:421,424.luxtlacampa: Conde, 1955:31, 48, 51, 94, 166,178; Padt, 1957:4; Vandel, 1964:203; Vandel,1965a: 170; Delamare Deboutteville, 1971:62.Type-locality.-Cueva (=Grutas) de Juxtlahuaca,Colotlipa, Guerrero, Mexico.Distribution.-Known only from the type-locality.See Fig. 67.Discussion.-The genus luxtlacampa indudes onlythe two species listed here, although Padt (1957)considered leannelicampa stygin Conde from Algeriato properly belong in luxtlacampa. This is dearlyincorrect.Litocampa atoyacensis (Wygodzinsky)Plusiocampa (Litocampa) atoyacensis Wygodzinsky,1944:368-370, fig. 1; Conde, 1949: 137; Conde,1955:124; Nicholas, 1962:180; Reddell, 1971b:49.Plusiocampa atoyacensis: Conde, 1955:130, 170,187.Litocampa (Cocytocampa) atoyacensis: Padt, 1957:27.Litocampa atoyacensis: Conde, 1975:421.Type-locality.-Cueva (=Grutas) de Atoyac, Atoyac,Veracruz, Mexico.Distribution.-Known only from the type-locality.See Fig. 67.Discussion.-This troglobite has been placed byPadt (1957) in the subgenus Cocytocampa. This subgenusis a heterogeneous assemblage of species fromEurope, South America, and Mexico. It is certainlynot a natural grouping of species. I am, therefore,following the usage of Conde (1975).Paratachycampa boneti WygodzinskyParatachycampa boneti Wygodzinsky, 1944:368,371-374, fig. 2-3; Conde, 1955:42,45, 72-73, 77,170,187; Nicholas, 1962:180; Reddell, 1967a:24;Reddell, 1971b:49; Conde, 1975:421.Plusiocampa boneti: Bonet, 1946a:113; Padt, 1957:4.Plasiocampa (Stygiocampa) boneti: Paclt, 1957:45.Paratachycampa: Conde, 1955:31, 42, 50, 94, 166,173; Vandel, 1964:203; Vandel, 1965a:170;Delamare Deboutteville, 1971:62.Type-locality.-Grutas de Garcia (=Grutas deVilla de Garcia), Garcia, Nuevo Leon, Mexico.Distribution.-Known only from the type-locality.See Fig. 67.Discussion.-Paratachycampa is a monotypic genus.Padt (1957) synonymized the genus with Plusiocampaand placed P. boneti in the subgenus Stygiocampaalong with species from Bulgaria, Yugoslavia,and Australia. This is certainly not a natural assemblageof species and does not reflect the true relationshipsof this distinctive troglobite; therefore, at thesuggestion of Dr. Pedro Wygodzinsky (pers. comm.),I am retaining the original classification.Podocampa cavernicola (Wygodzinsky)Parallocampa (Parallocampa) cavernicola Wygodzinsky,1944:368,380-382, fig. 7; Conde, 1955:166,170,187; Nicholas, 1962:180; Reddell, 1971b:48.Parallocampa cavernicola: Bonet, 1946a: 113; Reddell,1967a:24.Meiocampa (Remycampa) cavernicola: Paclt, 1957:31.Parallocampa: Vandel, 1964:203; Vandel, 1965a:170; Delamare Deboutteville, 1971:62.Podocampa cavernicola: Conde, 1975:421.Type-locality.-Grutas de Garcia (=Grutas deVilla de Garcia), Garcia, Nuevo Leon, Mexico.Distribution.-Known only from the type-locality.See Fig. 67.Discussion.-This species was originally placed inParallocampa, a complex of North American species.Paclt (1957) has removed some of these species, includingP. cavernicola, and placed them in the Moroccansubgenus Remycampa. This is certainly an artificialgrouping. I am here following the usage ofConde (1975) in placing this species in the genusPodocampa.Family JapygidaeOur knowledge of the japygids of Mexico is extremelylimited. Only one species has been positivelyidentified. Allojapyx allodontus Silvestri, an epigeanspecies described from southern Mexico, has beenreported from Sotano de la Tinaja, San Luis Potosi.Careful study of the holotype of this poorly knownspecies may reveal that the San Luis Potosi specimensbelong to an undescribed species. Other generaknown from Mexico include Metajapyx and Mixojapyx.Several undescribed species of troglophile areknown. Japygids are usually found under rocks, inleaf litter, and in rotting wood. In some Mexicancaves, however, large specimens have been collectedfrom moist silt and clay banks.Family ParajapygidaeSilvestri (1948) reported Parajapyx mexicanusSilvestri from Cueva de Carroza, Yucatan. This family203