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tzotzile Brignoli from Chiapas; M. pusillus Gertschfrom Nuevo Leon; M. rainesi Gertsch from NuevoLeon and Tamaulipas; and M. gracilipes Gertsch fromAlta Verapaz, Guatemala. Three undescribed speciesare known from caves in Veracruz. All of the cavernicolespecies of the genus are presumably troglophiles.These spiders are found in all parts of the caves,where they hang in delicate webs along the walls oramong speleothems. See Fig. 38 for the distributionof this genus in the caves of the region.The best-represented genus of spider in the cavesof Mexico, Guatemala, and Belize is Metagonia (seeFigs. 39-41). Eight species are considered to he troglobitesand are discussed below. The remaining 17species are troglophiles (Chamberlin and Ivie, 1938b;Gertsch, 1971a, 1973h, 1977h; Brignoli, 1972,1974b): M. amica Gertsch, M. pasquinii Brignoli, andM. punctata Gertsch from San Luis Potosi; M. candelaGertsch and M. serena Gertsch from NuevoLeon; M. capilla Gertsch, M. secreta Gertsch, and M.suzanne Gertsch from Tamaulipas; M. coahuilaGertsch from Coahuila; M. iviei Gertsch from QuintanaRoo and Yucatan; M. mcnatti Gertsch fromChiapas; M. maximiliani Brignoli from Queretaro; M........ " .. ././"~ /I--~"~ "I\I\(,\ ""'-v ~I\)/,/'.2,--4'..J--'-' .2'_ .3MEXICO~, //I/), /\/IIII\\, ././GUATEMALAI/i(,)I• i....-'-.'-."'\...,ii: Iu· ..../-'-'-' IIIii,... ..-'i1-/.//r\r'Fig. 36.~Distribution of troglophilic pholcid spiders of the genus Coryssocnemis: 1, Coryssocnemis simoni; 2, C. abernathyi;3, C. c1arus; 4, C. iviei; 5, C. iviei and C. simoni; 6, Coryssocnemis n. sp. 1; 7, Coryssocnemis n. sp. 2; 8, Coryssocnemisn. sp. 3; 9, C. placidus; 10, Coryssocnemis n. sp. 4; 11, C. facetus; 12, C. pecki.147