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n. 2, San Luis Potosi; and K. rugosus from Cueva deOjo de Agua de Tlilapan, Veracruz. Silhavy (1974)reported the presence of K. rugosus in Cueva del Ojode Agua Grande, Veracruz, and described K. brignoliifrom Cueva Tlilapan, Veracruz. Karos dybasi (Goodnightand Goodnight) was reported from Cueva deEI Jobo, San Luis Potosi, by Goodnight and Goodnight(1973). See Fig. 48 for the distribution ofKaros in Mexican caves.Three species of the genus Paramitraceras havebeen identified from Mexican caves (see Fig. 47).Goodnight and Goodnight (1973) reported P. granulatusCambridge from Cueva del Guayabo, Oaxaca.Silhary (1974) identified P. hispidulus Cambridgefrom Cueva de la Golondrina, Chiapas. Paramitracerasfemoralis Goodnight and Goodnight was reoported by Silhary (1977) from Sotano de Malpaso,Chiapas. Pellobunus mericanus Goodnight and Goodnightis known from caves in Nuevo Leon and Queretaro(Goodnight and Goodnight, 1971, 1973) (seeFig. 47). Goodnight and Goodnight (1971) describedHoplobunus robustus from caves in the Tequila regionof Veracruz. This species is also known fromcaves in the Potrero region of Veracruz (Goodnightand Goodnight, 1973) (see Fig. 50). Silhavy (1974)removed this species to the genus Stygnopsis. This isa large distinctive species which is frequently abundanton cave walls and rocky floor areas.GUATEMALA/r\r'~ ...;.//Fig. 48.-Distribution of troglophilic phalangodid opilionids of the genus Karos: 1, Karos parow; 2, K. gratiosus; 3, K.depre8sus; 4, K. dybasi, K. gratio8Us, and K. projectus; 5, K. rugosw; 6, K. brignolii and K. rugosw.162