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Discussion.-This is the largest species of the genus.The greater size and more slender appendagessuggest that it is restricted to the cave habitat. Thegenus is known from Florida (U.S.A.), Jamaica,Puerto Rico, Cura/iao, Tamaulipas, Chiapas, and Yucatan.Two additional species are known only fromcaves (P. maya Chamberlin from Yucatan and P. similisMuchmore from Tamaulipas), but are smaller andless attenuate than P. grandis. Nicholas (1962) listsP. maya as a troglobite, but it is probably best consideredto be a troglophile.Family VachoniidaeParavachonium bolivari BeierParavachonium bolivari Beier, 1956:81, 82-83, 85,fig. 1; Chamberlin and Malcolm, 1960:114; Reddell,1965a:19; Barrera, 1968:313; Muchmore,1969:32; Reddell, 1971b:27; Reddell and Mitchell,1971a:144; Muchmore, 1972a:261, 267, 268,269; Muchmore, 1973a:57, fig. 32; Reddell andElliott, 1973a:I71, 173.Paravachonium: Reddell, 1967c:55.Type-locality.-Cueva (=Grutas) de Quintero, Tamaulipas,Mexico.Distribution.-Known only from the type-locality.See Fig. 20.Discussion.- This species is known only from theholotype female and a deutonymph. Although Beierconsidered this species as belonbring to the familyVachoniidae, Muchmore (1973a) considers the affinitiesof the genus to be obscure. Paravachonium isknown only from these two species and an undescribedtroglobite from Sumidero de Oyamel, Tamaulipas.Paravachonium superbum l\luchmoreParavachonium sp.: Reddell, 1967c:55; Reddell,1971b:27; Reddell and Mitchell, 1971b:184-185;Vomero, 1974:350.Paravachonium superbum Muchmore, 1972a:268,269, 271, fig. 8-11; Reddell, 1973a:33, 37; Reddelland Elliott, 1973b:181, 183.Type.locality.-Sotano de Gomez Farias, justsouth of the village of Gomez Farias, Tamaulipas,Mexico.Distrihution.-Known only from the type-locality.See Fig. 20.Discussion.-This species is known from a single femalecollected beneath a rock at the 25-meter level ofthe cave. This large, attenuate species is closely relatedto P. bolivari.Vachonium belizense MuchmoreVachonium belizense Muchmore, 1973a:58, fig. 36­38; Muchmore, 1977:72.Type.locality.-Mountain Cow Cave, Caves Branch,Belize.Distribution.-Known only from the type-locality.See Fig. 20.Discussion.-This is the largest species of the genusand the only one known outside of the Mexican stateof Yucatan. It is known only from a single tritonymph.Vachonium boneti ChamberlinVachonium boneti Chamberlin, 1947:4,5,6-7,8,9,fig. 1-23; Chamberlin and Malcolm, 1960:114;Muchmore, 1969:32; Reddell, 1971b:27; Muchmore,1972a:261, 267; Muchmore, 1973a:57;Muchmore, 1977:72; Reddell, 1977b:230, 240,282.Type.locality.-Cueva de Sabaca (=Actun Sabaca),Yucatan, Mexico.Distribution.-Known only from the type-locality.See Fig. 20.Discussion.-This species is known only from asingle female. The genus Vachonium is possiblyclosely related to Troglohya. Vachonium containsonly the f; ie troglobites listed here. An editorial addendumto l\luchmore (1969) lists this species asoccurring in "Ia Cueva de Palmito, 'uevo Leon";this is an obvious error. A single tritonymph fromActUn Xpukil, Yucatan, is this or a closely relatedspecies (Muchmore, 1977).Vachonium cryptum MuchmoreVachonium cryptum Muchmore, 1977:72, 73, fig.20-21; Reddell, 1977b:230, 240, 271.Type-locality.-ActUn Xkyc, 1 km S Calcehtok,Yucatan, Mexico.Distribution.-Known only from the type-locality.See Fig. 20.Discussion.-This species, known only from asingle female, is closely related to V. kauae and V.maya. The only specimen was collected from theunderside of a Mayan stone water dish.Vachonium kauae MuchmoreVachonium kauae Muchmore, 1973a:57-58, fig. 33­35; Muchmore, 1977:72; Reddell, 1977b:230,239, 240, 260.Type-locality.-Cueva de Kaua (=ActUn Kaua),1 km S Kaua, Yucatan, Mexico.123