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Family DiplocentridaeDiplocentrus anophthalmus FranckeDiplocentrus anophthalmus Francke, 1977:56, 58-61,fig. 40-52, 54; Reddell, 1977b:230, 231,240,241,263, fig. 6; Francke, 1978:44-45.Eyeless diplocentrid scorpion: Mitchell and Peck,1978:167.Type-Iocality.-Acttin Chukum, Yucatan, Mexico.Distribution.-Known only from the type-locality.See Fig. 17.Discussion.-This is the most highly cave-adaptedspecies known in the family Diplocentridae. The me-dian eyes are absent and the lateral eyes are reducedto vestiges. It was found under rocks in the innerroom of Actun ChukuID. In addition to the two otherspecies of troglobite listed below, the family Diplor.entridaeis represented in caves by D. reddelliFrancke, known only from Aclun Xpukil, Yucatan;and by an undescribed species of Cazierius from ActUnLoltun, Yucatan.Diplocentrus cueva FranckeDiplocentrus cueva Francke, 1978:39-45, fig. 1-12.Type-Iocality.-Cueva Desapareciendo, 2 km W.Acatlan, Oaxaca, Mexico.MEXICO/II,,, /\///IIIIII ~GUATEMALAI .I I l\ •., ...J............ - ~· .....I_;"!--._.-._._. I[ // .....~! i\/ \.-! \ii\..'I\,.'-.,Ii/'-"1..JiL/r·\r- . r'.-'//Fig. 17.-Distribution of troglobitic scorpions: 1, Chactidae gen. et sp. 1; 2, Chactidae gen. et sp. 2; 3, Typhlochactasrhodesi; 4, T. elliotti; 5, T. reddelli; 6, Vaejovis gracilis; 7, Family incertae sedis; 8, Diplocentrus cueva; 9, D. mitchelli; 10, D.anophthalmus.116