North American synichotritiidae (Acari : Oribatida) 2. Synichotritia spinulosa and S-caroli

Two species of the oribatid mite genus Synichotritia (Euphthiracaroidea: Sy nichotritiidae), S. spinulosa and S, caroli(the type species), are redescri bed, based on adult specimens from California (including paratypes). Despit e differences in the setation of notogaster, ventral shield, ovipositor and legs, and different palp segmentation, we continue to consider these speci es congeneric. The three other described species of Synichotritia from Chin a are transferred to Sabahtritia, requiring slight adjustment to the diagno sis of this closely related genus.