INTRODUCTION. 
Australian R. (New Holland [feste C. L. Koch]). 
AMthiopian R. (South Africa [teste C. L. Koch]). 
Gen. Araas. 
Palearctic Region (Europe, Egypt, Persia). 
Nearctic R. (U.S.A.). 
Neotropical R. (Mexico, Guatemala, Paraguay). 
Ethiopian R. (Ovampo Land). 
Fam. ORIBATIDA. 
Gen. OriBata. 
Palearctic Region (Europe, N.E. Siberia, Algeria). 
Nearctic R. (U.S.A.). 
Neotropical R. (Central America, Brazil, Paraguay). 
Gen. HoptorHora. 
Palearctic Region (Europe). 
Nearctic R. (U.S.A.). 
Neotropical R. (Guatemala, Brazil). 
Fam. NICOLETIELLIDZ. 
Gen. NIcOLETIELLA. 
Palearctic Region (Europe). 
Neotropical R. (Guatemala). 
Fam. GAMASIDA. 
Gen. Uropopa. 
Palearctic Region (Europe). 
Nearctic R. (U.S.A.). 
“Neotropical R. (Central America, Brazil, Paraguay). 
Gen. HotostasPis. 
Palearctic Region (Europe, Bering’s Island). 
Neotropical R. (Central America, Brazil, Paraguay, La Plata). 
Gen. Gamasus. 
Palzearctic Region (Europe, Japan). 
Nearctic R. (U.S.A.). 
Neotropical R. (Central America, Brazil, Paraguay, La Plata). 
Gen. CEL@NopsIS. 
Palearctic Region (Europe). 
Neotropical R. (British Honduras, Panama, Brazil, Paraguay, La Plata). 
Gen. PacHyL#.Laps. 
Palearctic Region (Europe). 
Neotropical R. (Mexico, Brazil, Paraguay). 
BIOL. CENTR.-AMER., Arachn, Acar., January 1893. 
