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Cleidogona hunapu ShearCleidogona hunapu Shear, 1977a:236-238, fig. 1-8.Type-locality.-Cueva del Burro, Lago de Malpaso,Rio Encajonado, Chiapas, Mexico.Distribution.-Known only from the type-locality.See Fig. 53.Discussion.~This depigmented species with only14 ocelli is closely related to C. forficula Shear, anepigean species from San Cristobal de las Casas, Chiapas.These are the only species known in the forficulagroup.Cleidogona pecki ShearCleidogona sp.: Reddell and Mitchell, 1971b:188(Cueva de la Capilla and Cueva de la Mina recordsonly).Cleidogona pecki Shear, 1972:207, 213, fig. 221­225; Reddell and Elliott, 1973b:185; Shear,1974:254.Type-locality.-Cueva de la Mina, 6 mi northwestof Gomez Farias, Tamaulipas, Mexico.Distribution.-Known from two caves in the Sierrade Guatemala, Tamaulipas. See Fig. 53.Records.-Tamaulipas: Cueva de la Capilla andCueva de la Mina.Discussion.~ This probable troglobite is unpigmentedand has the ocelli reduced to 16-20. It is amember of the crystallina group. The only other speciesin this group is C. crystallina Shear, which isknown only from four caves in the Sierra de Guatemala,including Cueva de la Capilla. Cleidogona crystallinaalso has a slightly reduced number of ocelli,and some individuals have reduced pigmentation.The crystallina group is intermediate in structurebetween the crucis group and the large, apparentlyactively speciating maculata group to the north andsouthwest. The crystallina group may represent apair of relict species now limited to caves.Family TrichopetalidaeMexiterpes egeo (Causey)Poterpes egeo Causey, 1969:46-47, 49, fig. 5,7-10;Reddell, 1971b:44; Shear, 1972:247; Elliott andReddell, 1973:196; Reddell, 1973a:34, 40.Mexiterpes egeo: Shear, 1974:255,256.Type-Iocality.-Cueva de EI (=la) Puente, 13 milessouth of San Francisco, San Luis Potosi, Mexico.Distribution.-Known from caves in the vicinity ofSan Francisco, San Luis Potosi. See Fig. 53.Records.-San Luis Potosi: ?Sotano del Puerto delos Lobos and Cueva de la Puente.Discussion.-Only a single female is known fromSotano del Puerto de los Lobos so this record must beconsidered tentative. Although eyes are present, theyare reduced. The family Trichopetalidae is representedin Mexico only by the four troglobitic specieslisted here. Although Shear (1974) considersPoterpesto be a synonym ofMexiterpes, Causey (pers. comm.)does not feel this position to be justified. The discoveryof additional species should help to clarify thegeneric status of the species ofPoterpes.Mexiterpes fishi (Causey)Poterpes fishi Causey, 1969:46, 47-49, fig. 6, 11-16;Reddell, 1971b:44; Shear, 1972:247; Reddell,1973a:34, 40.Mexiterpes fishi: Shear, 1974:256.Type-locality.-Cueva de la Luz, 20 miles west ofAquismon, San Luis Potosi, Mexico.Distribution.-Known only from the type-locality.See Fig. 53.Discussion.-This species is most closely related toM. egeo. The ocelli are reduced in number and thespecies is certainly a troglobite.Mexiterpes metallicus ShearMexiterpes metallicus Shear, 1972:247, 275, 280,281, fig. 532-538; Shear, 1974:256; Peck, 1977c:67.Type-locality.-1.2 miles east of Pinal de Amoles,Queretaro, Mexico, in an iron mine at roadside.Distribution.-Known only from the type-locality.See Fig. 53.Discussion.-This species possesses four smallocelli. It is most closely related to M. fishi and M.egeo. The "iron mine" is apparently a natural caveenlarged during the mining of mercury rather thanIron.Mexiterpes sabinus CauseyMexiterpes sabinus Causey, 1963:235-237, fig. 1-3;Reddell, 1965c:7; Reddell, 1967b:82; Causey,1968:124; Loomis, 1968:69; Causey, 1969:45­46, 49; Reddell, 1971b:44; Reddell and Mitchell,1971a:151; Shear, 1972:280, 281, fig. 529-531;Reddell, 1973a:34, 40; Reddell and Elliott,1973a:I72; Shear, 1974:255,256.Type-Iocality.-Sotano del Arroyo, near village ofLos Sabinos and 8 miles north of Valles, San Luis Potosi,Mexico.Distribution.-Known from four caves in theSierra de EI Abra near Valles, San Luis Potosi. SeeFig. 53.177