[EN] This fourth paper in the series devote(' to tue oribatid mites from soils of Spain contains descriptions and records of species belonging to the farnilies Pelopsidae, Achipteriidae, Oribatellidae, Ceratozetidae, Mycobatidae, Chamobatidae, Euzetidae and Galumnidae, being 62 species in all that are dealt with. A detailed list of sampling localities has been given previously (Graellsia, XXIV, 1968, pages 151-163). A new list of localities is now added as a result of the worl; carried out by Miss Carmen Capilla and Miss Ana M. Salinas in the author's laboratory and under his direction. A new subspecies Humerobatcs rostrolamellatus guadarramicus n. ssp. has been described from different localities in the Sierra de Guadarrama, near Madrid. The principal differences between the new subspecies and the nominate form are the following : 1) Greater body size, length : 9 9 912-936 it , 8` 816-880 width : 9 9 684-696 it , g 648-660 2) Translamella only recognizable at both ends, being wholly effaced in the rniddle. 3) Tutorium that in lateral view presents an acute-angled apex. The border running from this apex to the prodorsal surface shows two incisions and a central tip, instead of being whole and not indented as in tue nominate form. The shape of tutorium resembles that one of the New Guinean species H. papuanus Balogh, 1970. A certain number of new synonyms have been estabilished as a result of the present revision, mainly based on the collections preserved at the Instituto Espailol de Entomología, Madrid.

[ES] Los oribátidos de suelos españoles, excluidas las islas Canarias, pertenecientes a los Enarthronota, Mixonomata y Nothroidea fueron revisados en la primera parte de este estudio, que se publicó en Graellsia, tomo XXIV, 1968 (1969), páginas 143-237. Los Circumdehiscentiae u oribátidos superiores, pertenecientes a las familias Hermannie- Ilidae, Liodidae, Glymnodamaeidae, Licnodamaeidae, Damaeidae, Ccpheidae, Microzetidae, Zetorchestidac, Gustaviidae, Eremaeidae, Amerobelbidae, Eremobelbidae y Metrioplidae, todas ellas correspondientes al grupo de los picnonóticos, fueron objeto de la segunda parte, que apareció en Eos, tomo XLV, 1969 (1970), páginas 241-317. Las restantes familias de oribätidos superiores picnonóticos con representantes en nuestra fauna edáfica, es decir, Liacaridae, Xeiillidae, Carabodidae, Tectocepheidae, Oppiidae, Caleremaeidae, Trizetidae, Auto gnetidae, Thyrisomidae, Suctobelbidae, Ameronothridae, Cymbaeremaeiciae y Micreremidae, se revisaron en la tercera parte, publicada en Eos, tomo XLVI, 1970 (1971), págs. 263-349. También se incluyeron en esta tercera parte los Passalozetidae y Scutoverticidae, que si bien son poronáticos, constituyen, realmente, unas familias de transición entre ambos grupos de Circurndehiscentiac.

Peer reviewed