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Discussion.-The genus Tohila was originally assignedto the subfamily Pentacentrinae and consideredto be most closely related to the genus Trigonidomimusof the Old World (Hubbell, 1938). Hubbell(1972) has reexamined these genera and feelsnow that Tohila is most closely related to Paracophusand that they are probably both members of the subfamilyPhalangopsinae. Tohila is a monotypic genusand is small and pale with degenerate eyes. It is usuallyfound beneath rocks, but it is also occasionallytaken from moist flowstone or cave walls. It has beencollected from several caves which are also inhabitedby the troglophilic Amphiacusta yucatana. Numerouscollections of crickets from caves in the YucatanPeninsula await study, and some will certainly proveto contain this species.Family RhaphidophoridaeThe camel crickets of the family Rhaphidophoridaeare frequently found in the caves of Mexico andGuatemala. The 12 described species, however, representa small percentage of the fauna to be reportedeventually from caves. The described species belongto the genera Ceuthophilus, Anargyrtes, Leptargyrtes,Exochodrilus, Hypsobadistes, and Phoberopus. Severalother genera await description. The Rhaphidophoridaeappear to be absent from low elevations alongthe eastern flanks of the Sierra Madre Oriental southinto the Yucatan Peninsula. The caves in this regionare instead populated by species of the gryUid genusAmphiacusta. Amphiacusta ill this area inhabits theentrance zone usually occupied by rhaphidophoridsin other regions.Hubbell (1972) erected the genus Anargyrtes fortwo species from the states of Mexico and Guerrero.Anargyrtes annulata (Bilimek) was described fromGrutas de Cacahuamilpa, Guerrero; it is now knownalso from many caves in Guerrero and Mexico. Anargyrtesbolivari Hubbell is known primarily from epigeanlocalities, but it has been found in a lava cavenear San Geronimo, Mexico (see Fig. 72).The genus Ceuthophilus is the principal cavecricket genus inhabiting caves in the southwesternUnited States and northern Mexico. Only two species,Ceuthophilus (Geotettix) cunicularis Hubbell and C.(Ceuthophilus) variegatus Scudder, have been identifiedfrom Mexican caves. The first species is knownonly from Cueva de los Lagos, Coahuila, and the latterhas been collected in several caves in Coahuila andChihuahua (see Fig. 72). Many undescribed species ofCeuthophilus have been collected in caves in northernMexico.Hubbell (1972) described a new genus and twonew species for the camel crickets inhabiting thehigher elevations of the Sierra de Guatemala, Tamaulipas.Exochodrilus caelestis occurs in two caves atRancho del Cielo, and E. forcipatus is known fromcaves at higher elevations (see Fig. 72).The genus Leptargyrtes was erected by Hubbell(1972) to include two new species from Queretaro:L. boneti from caves near El Lobo in eastern Queretaro,and L. tejamanilae from caves to the west nearPinal de Amoles and Tejamanil (see Fig. 72).Hubbell (1977) described the Phoberopes groupto include several species of camel cricket from Guatemalaand Chiapas, Mexico. Phoberopus minor Hubbellis known from Cueva de Chemal n. 1 and Cuevade Santa Eulalia (=Cueva de los Resadores), Huehuetenango,Guatemala. Three species of long-legged,delicate crickets were placed in the new genus Hypsobadistes:H. gracilior Hubbell from two caves in Huehuetenango,Guatemala;H. stuarti Hubbell from Cuevadel Rayo de San Felipe, Chiapas; andH. tenuis Hubbellfrom three caves at San Agustin, Chiapas (see Fig. 72).Apparently undescribed species of the generaPristoceuthophilus and Argyrtes have been collectedfrom caves in Coahuila and Hidalgo respectively.Family StenopehnatidaeUnidentified species of the stenopelmatid generaAnabropsis, Glaphyrosoma, and Stenopelmatus havebeen collected from Mexican caves, but they are allprobably accidentals.Family TettigoniidaeA single unidentified tettigoniid of the genusDichopetala was collected below the entrance dropinto Cueva de Taninul n. 4, San Luis Potosi; it iscertainly an accidental.Order EmbiopteraAn undetermined genus and speci~ of the seldomcollected order Embioptera was found in Sotano deEI Triunfo, San Luis Potosi. It is presumably an accidental.Order PsocopteraThe order Psocoptera is occasionally taken fromcaves in Mexico and is doubtless far more abundantthan the few records would indicate. This group includestroglobites in other parts of the world, but allof the species known from Mexican caves are probablytroglophiles or trogloxenes.Family CaeciliidaeAn undetermined species of the genus Caeciliuswas collected in Sotano de El Triunfo, San Luis Potosi.Its ecological status is unknown.211