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Rowland, 1975b:19, 20; Dumitresco, 1977:157;Rowland and Reddell, 1977:80, 83-85, 98, fig. 2;Rowland and Reddell, 1979a: 163.Type-Iocality.-Cueva del Agua (de Simon Salinas),50 km SW Soto la Marina, Tamaulipas, Mexico.Distrihution.-Known only from two caves in theSierra de Tamaulipas, Tamaulipas. See Fig. 23.Records.-Tamaulipas: Cueva del Agua de SimonSalinas and Cueva de la Virgen de Guadalupe.Discussion.-This pale species with long first legsis apparently isolated in its moist cave habitat by thesemi-arid environment of the Sierra de Tamaulipas. Itappears to be most closely related to S. mexicanus.Rowland (1975a) tentatively reported females fromCueva de los Cuarteles, Tamaulipas, as belonging tothis species. The recent discovery of males from thispopulation indicates that it is an undescribed speciesvery closely related to S. lukensi.Schizomus mitchelli RowlandSchizomus sp.: Mitchell, 1970b:65.Schizomus mitchelli Rowland, 1971b:121-122, fig. 7­9, 18; Reddell and Mitchell, 1971a:145; Brignoli,1973a:6; Reddell, 1973a:38; Rowland, 1973c:135; Brignoli, 1974a:145-146, fig. la, 2e; Rowland,1975a:34, 166, 167-168, 169, 181, 182,211-213, 216-217, 228, 231,366-367,368-369,395, fig. 164, 182, 188, 212-215, 292; Dumi·tresco, 1977:157; Rowland and Reddell, 1977:80,84, 85, 96, fig. 2; Rowland and Reddell, 1979a:163.Schizomids: Rowland, 1972a:73.Type-Iocality.-Cueva de El Pachon, 7.5 km NE ofAntigua Morelos, Tamaulipas, Mexico.Distribution.-Known only from three caves in thenorthern Sierra de El Abra, Tamaulipas. See Fig. 23.Records.-Tamaulipas: Cueva de la Florida, Cuevade El Pachon, and Grutas de Quintero.Discussion.-This species possesses slender elongateappendages and is almost certainly a troglobite. Collectionsoutside of the entrance of Cueva de la Floridahave included only S. mexicanus. A female ofthis species was observed carrying eggs. This is un·usual behavior since previous accounts of schizomidsindicated that they built cocoons and the female remainedin the cocoon until the eggs hatched. Thismay be an adaptation to the cavernicole existenceand its comparatively low number of predators.Schizomus pallidus RowlandSchizomus pallidus Rowland, 1975b:7, 13-15, fig. 6;Rowland, 1975a:34, 166, 167-168, 169,184-186,188, 216-217, 218·219, 222-223, 228, 230, 280,366-367, 368-369, 396, fig. 166, 179, 196,292;Rowland and Reddell, 1977:80,84,87,88, fig. 2;Rowland and Reddell, 1979a:163.Type-Iocality.-Cueva Macinga, Tlilapan, Veracruz,Mexico.Distribution.-Known only from the type-locality.See Fig. 23.Discussion.-This pale species with elongate appendagesappears to be related to S. mexicanus but isquite distinct in some respects. It was found on siltbeneath rocks in a dry side passage of the cave.Schizomus pecki RowlandSchizomus pecki Rowland, 1973a:19-23, fig. 17-19;Rowland, 1973c:136; Sbordoni et al., 1974:14­15; Rowland, 1975a:34, 135, 167-168, 188,209,232, 234, 239-241, 242, 243, 244, 246-247, fig.216,218,221,231; Dumitresco, 1977:157; Rowlandand Reddell, 1977:80, 83, 84, 96, 98-99,fig. 2; Rowland and Reddell, 1979a:163; Rowlandand Reddell, 1979b:l04.Type-Iocality.-Las Grutas de Cocona, 2 mi NETeapa, Tabasco, Mexico.Distribution.-Known only from two caves nearTeapa, Tabasco. See Fig. 23.Records.-Tabasco: Grutas del Cocona and Resumideradel Cocona.Discussion.-This large, pale species is abundant onsilt under rotten wood in the more remote sectionsof Grutas del Cocona. A dark robust species, S. trilobatus,inhabits litter near the cave entrance.Schizomus reddelli RowlandSchizomus reddelli Rowland, 1971b:123, 124, 126,fig. 13-15; Reddell and Mitchell, 1971b:185; Reddell,1973a:38; Rowland, 1973a:21; Rowland,1973c:135; Brignoli, 1974a:147, 149; Rowland,1975a:34, 166, 169, 177, 178-179,181,214-215,218-219, 220-221, 228-230, 366-367, 368-369,394, fig. 159, 175, 189-190; Rowland and Reddell,1977:80, 84, 85, fig. 2; Rowland and Reddell,1979a:163.Schizomus mexicanus Rowland: Reddell and Mitchell,1971b:185 (misidentification); Vomero, 1974:341 (misidentification).Schizomus reddeli: Dumitresco, 1977: 157 (erroneousspelling).Type-Iocality.-Cueva de Tres Manatiales (=Cuevadel Ojo de Agua de Manantiales), 23 km NW Limon,Tamaulipas, Mexico.Distribution.-Known from two caves in the Sierrade Guatemala, Tamaulipas. See Fig. 23.129