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Those species of troglobite which have been describedfrom Mexico are listed in Table 2 in thechronological order of their description.BelizeThe cave fauna of Belize has been little studiedand most collections have been made in caves nearAugustine and Caves Branch in Cayo District.Paul Williams studied the phlebotomine sandfliesof four caves near Augustine and one near Millionariobetween January 1964 and May 1969 (Williams,1976c).Marie and Charles Goodnight collected, amongother species, opilionids in one of the Rio Frio caves,Cayo District, onJuly 1, 1971 (Goodnight and Goodnight,1977).A small collection of invertebrates was made byDavid McKenzie on January 19, 1972, in St. Augus.tine Cave, Cayo District.Most of our knowledge of the cave fauna of Belizeis the result of a study by Sand J. Peck during Julyand August 1972. They visited several caves nearAugustine and Caves Branch and obtained severalspecies of unusual interest. Among their collectionswere new species of troglobitic spider (Gertsch,1973b), pseudoscorpion (Muchmore, 1973a), opilionid(Goodnight and Goodnight, 1977), and milliped(Shear, 1973).On July 20, 1972, Charles Goodnight visited acave near Augustine and collected a new species oftroglobitic pseudoscorpion (Muchmore, 1973b).During July and August 1976 Logan McNatt, TomMiller, and Michael Shawcross studied several cavesnear Caves Branch, Cayo District. Most of these collectionsremain unstudied, but a troglobitic opilionidwas described by Goodnight and Goodnight (1977).Other specimens of interest included undescribedspecies of troglobitic milliped and charontid amblypygid.Logan McNatt made additional collections inthis same region in May 1977.The troglobites which have been described fromBelize are listed in chronological order in Table 2.GuatemalaThe first cave inhabiting species to be describedfrom Guatemala was the cricket Arachnomimuscavicola Saussure. This species was collected byGeorge C. Champion during the period of 1879-1881in Grutas de Lanquin, Alta Verapaz (Saussure, 1897).Dr. Giaquinto ,1ira, an Italian physician studyingmalaria and sleeping sickness in Guatemala in 1933,visited Cueva de Sepacuite, Alta Verapaz, and obtaineda series of a new species of catopid beetle,described by J eannel (1936) as Ptomaphagus (A delops)giaquintoi. Additional specimens of the samespecies were obtained in 1948 from Grutas de Lan·quin by R. D. Mitchell (Peck, 1973c).On June 13, 1959, William A. Varnedoe collecteda new species of milliped in Grutas El Silvino, IzabaJ.Also in June he visited and made collections in Grutasde Lanquln, Alta Verapaz; Cueva Jobitzinaj, Peten;and Cueva Caman, Solola.In 1960 and 1961 W. E. Duellman, .f. Knox Jones,Jr., and others collected bats from caves in severalareas of Guatemala (Jones, 1966).Collections were made in Cueva de Tabacal andCueva de los Resadores, Huehuetenango, in November1967 by David McKenzie. In the latter cave hefound a remarkable troglobitic isopod (Schultz,1977).During January and February 1968 the ExplorersClub of New York sponsored an expedition to AltaVerapaz (Gurnee, 1968). The biologist for this expeditionwas Bro. G. Nicholas, and he made collectionsin 12 caves (Nicholas, 1968). Probably the mostnotable find of this expedition was a new genus andspecies of cave inhabiting crab (Smalley, 1970) fromCueva Seamay. Other species of interest included astill undescribed troglobitic planarian in Grutas deLanquln. This is the only cavernicole planarianknown from Guatemala.In August 1969 Stewart B. and James H. Peckvisited eight caves in Izabal and Alta Verapaz (Peckand Peck, 1973). Among the fauna of in terest wereblind amphipods (Ruffo and Vigna Taglianti, 1974),spider (Gertsch, 1973b), and pseudoscorpion (Much.more, 1973b).During the course of the 1971 Italian ZoologicalMission to Mexico, three caves in Peten were visitedby Valerio Sbordoni, Roherto Argano, and AldoZullini (1974).D. Dreux, P. J ouhert, and O. Rubio of the Centred'Etudes et de Recherches Speleologiques en MilieuTropical explored numerous caves in many parts ofGuatemala (Dreux, 1976). Their biological collectionsin Alta Verapaz included, most notably, two new speciesof blind crab, described by Delamare Deboutte·ville (1976) as Typhlopseudothelphusa juberthiei andT. mitchelli.On January 22, 1972, David McKenzie made a col·lection in Cueva Jobitzinaj, Peten. This included anew species of ricinuleid, described by Gertsch(1977a) as Cryptocellus cookei. In May 1972 severalcaves in the Montaiias de Cuilco near La Libertad,Huehuetenango, were visited by David McKenzie andStuart Murphy. Their collections included a new genusand species of rhaphidophorid cricket (Hubbell,14