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(1979) as Diplocentrus cueva. A new species of troglobitichomopteran was collected in this same monthby Mike McEachern in Cueva de Cayetano, Oaxaca.Further studies were made in December 1975 andJanuary 1976 by Dennis Barnes, Tom Byrd, MarciaCossey, Andy Grubbs, and Jim Rodemaker in thecaves of the San Nicolas de los Montes region, SanLuis Potosi.December 1975 to January 1976 Peter Sprouse,Peter Strickland, and Carmen Soileau made collectionsin caves in the Sierra el Pino, San Luis Potosiand near Pinalito, Hidalgo.Biological investigations were made of severalcaves in the San Juan area, Queretaro, in January1976, by Roy Jameson and Patty Mothes, and inMarch 1976 by Alexia Cochrane, Gill Ediger, AndyGrubbs, and Roy Jameson.June 8-15, 1976, Roy Jameson and Patty Mothescollected new species of blind planaria, tarantula,and milliped in caves northwest of Xilitla in Queretaro(Jameson, 1977).In November 1976 the Rio Purificacion area ofTamaulipas was the object of intensive study. Collectionsby Andy Grubbs and Peter Sprouse includednew species of planarian, opilionid, and trechinebeetle.Collections in the Huautla de Jimenez region,Oaxaca, December 1976 to January 1977 by RoyJameson and Patty Mothes included blind millipeds,opilionids, carabid beetles, and a new genus andspecies of eyeless scorpion of unknown familialaffinities.An expedition from December 15, 1976, toJanuary 15,1977, by Andy Grubbs, David McKenzie,James Reddell, and Carmen Soileau included visits tothe Sierra de Tamaulipas, Tamaulipas; the Cuetzalanregion, Puebla; the Acatliin region, Oaxaca; and theJalapa, Cuitlahuac, and Atoyac regions, Veracruz. Atotal of 38 caves were studied; collections includednew species of mysid (Bowman, 1977b), crayfish,shrimp, spider, milliped, and homopteran.The first visit to the karst region of Zoquitliin,Puebla, was made by Preston Forsythe, Jim Rodemaker,Peter Strickland, and others in January 1977.Their collections included a new genus and speciesof snail and blind opilionids, millipeds, and carabidbeetles.In January 1977 Robert W. Mitchell and LindaFaulkenberry collected, among other species ofinterest, a new species of cirolanid isopod in the cavesof the San Nicolas de los Montes region, San LuisPotosi.Collections were made by Carmen Soileau inMarch 1977 in caves in the vicinity of Yochib, Chiapas.The study of the Rio Purificacion region, Tamaulipas,intensified in 1977 with expeditions in March,May, November, and December. The principal collectorsin this area were Gill Ediger, David McKenzie,Dale Pate, and Peter Sprouse. Their collections includedtroglobitic stenasellid and trichoniscid isopods,spiders, opilionids, centipeds, and carabidbeetles.During an expedition in April-May 1977 to Huautlade Jimenez, Oaxaca, Tracy Johnson and Bill Steelecollected blind millipeds, opilionids, and carabidbeetles in several caves.In May 1977 Roy Jameson and Patty Mothes continuedtheir study of the caves in the region northwestof Xilitla in Queretaro. Their collections includedblind planaria, isopods, spiders, opilionids,and millipeds.Roy Jameson and Patty Mothes in November andDecember 1977 made the first study of the caves ofthe San Joaquin, Queretaro, region (Mothes, 1978).Among their collections were new species of blindmilliped.December 1977 to January 1978 Jean Jancewicz,Roy Jameson, Dino Lowery, and Steve Zeman collectedtroglobitic amblypygids, spiders, millipeds,and carabid beetles in several caves in the Huautla deJimenez region of Oaxaca.In January 1978 Jerry Atkinson, Preston Forsythe,Jocie Hooper, and Peter Strickland revisited theZoquitliin, Puebla, area (Atkinson, 1978). Theircollections included a new species of blind nesticidspider (Gertsch, in press).Terry Sayther in January 1978 collected blind isopodsand other fauna of interest in several caves inthe Atoyac region, Veracruz.The caves of the Purificacion region of Tamaulipaswere the object of intensive study during 1978, withthe primary emphasis being placed on the SistemaPurificacion, Cueva X, Sumidero de Oyamel, andCueva de los Allarines. The principal collectors duringthis period were William Elliott, Andy Grubbs, DavidMcKenzie, Dale Pate, Terry Raines, Peter Sprouse,Terri Treacy, and Lisa Wilk. Among the more notablefinds were undescribed species of troglobitic planaria,isopod, pseudoscorpion, opilionid, milliped, andcentiped.An expedition to the Huautla de Jimenez, Oaxaca,region in April and May 1978 by Bill Steele, BillStone, Andy Grubbs, Mike McEachern, Jill Dorman,Jim Smith, and others, resulted in the collection oftroglobitic scorpions, opilionids, millipeds, and carabidbeetles.13