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Myodopsylla gentilis Jordan and Rothschild wasfound in Cueva del Cochino, San Luis Potosi. A singlespecimen of M. globata Holland was collected fromGrutas del Cocom!, Tabasco; this is only the secondspecimen of this species, previously known from SanCristobal de las Casas, Chiapas. Sternopsyllus distinctatexana (C. Fox) was extremely abundant inguano in Grutas de San Bartolo and Cueva de la Boca,Nuevo Leon.Family PulicidaeThe family Pulicidae is represented in Mexicancaves by three species. Pulex irritans Linnaeus isknown from Cenote Sabacah (Sucopo), Yucatan, andCueva del Cochino, San Luis Potosi; it is usually associatedwith man and large carnivores. The specimensfrom Cueva del Cochino were taken from thedry entrance area of the cave. Pulex porcinus Jordanand Rothschild is known from Grutas de MonteBravo and Grutas de Xtacumbilxunam, Campeche,and from Cenote Amil, Yucatan. This species isusually associated with peccaries; its host in theabove caves is unknown. Pearse (1938b) reportedthe plague £lea, Xenopsylla cheopis (Rothschild) fromGrutas de Balankanche, Yucatan.Order DipteraAlmost 100 species of £ly have been collected inMexican caves (see Table 27). In addition, numerouscollections await study. Many £lies utilize theentrance areas as daytime retreats; others are attractedby water or carrion. Some species apparently aretroglophiles and complete their life cycle underground.No species from Mexico or Central Americais troglobitic. The following is a brief summary ofsome of the more significant species with respect tothe cave habitat.Suborder NematoceraFamily CeratopogonidaeTwo genera of this family have been identifiedfrom caves. The presence of larvae in caves indicatesthat they may possibly be troglophiles. Pearse(1938b) reported Dasyhelea sp. from Actun Gongora,Yucatan. Forcipomyia sp. has been reported fromCueva Chac Mol, Yucatan (Pearse, 1938b); it has alsobeen collected in Actun Xpukil, Yucatan.Family ChironomidaeSeveral species of midge of the family Chironomidaehave been collected from caves and cenotes inYucatan (pearse, 1936b, 1938b). The larvae of thisfamily are usually aquatic, and presumably, theTable 27.-Summary of cave inhabiting Diptera.NematoceraCecidomyiidaeCeratopogonidaeChironomidaeCulicidaeMycetophilidaePsychodidaeSciaridaeTipulidaeBrachyceraAsilidaeDolichopodidaeEmpidiidaeRhagionidaeScenopinidaeStratiomyidaeTabanidaeTherevidaeCyclorrhaphaAgriomyzidaeCalliphoridaeChloropidaeDrosophilidaeLonchaeidaeMetopiidaeMilichiidaeMuscidaePhoridaeSciomyzidaeSphaeroceridaeStreblidaeTachinidaeTotalTroglobitesooooooooooooooooooooooooooooooOther Speciesadults' presence in this habitat is a result of theabsence of surface water in most of northern Yucatan.Tendipes fulvipilus Rempel is an apparent troglophilein Cueva del Azufre, Tabasco (Gordon andRosen, 1962). It has been taken from guano depositsin large numbers.Family Culicidae225831625Eight species of mosquito of the family Culicidaehave been collected from caves and cenotes in Yucatan(Pearse, 1938b). Mosquitoes frequently utilizethe entrance of caves for shelter, but in Yucatanwhere surface water is almost nonexistent, manyspecies are dependent upon caves and cenotes asplaces in which to deposit their eggs. Pearse (1938b)reported Aedes angustivittatus Dyar and Knab, A.euplocamus Dyar, A. taeniorhynchus (Wiedemann),Culex sp., Haemagogus sp., Isostomyia sp., Mochlonyxsp., and Psorophora sp. from caves in northernYucatan.I2III2I2I221115441217297234