S. Mahunka szerk.: Folia Entomologica Hungarica 54. (Budapest, 1993)

area. Setae c/, C2 and p2 borne excentrically on small sclerites on unsclerotized integument. Seta C3 without microsclerite at base. All gastronotal setae other than c series thin, smooth, about 14 um long; c series setae thick, barbed, a and C2 about 45 urn long, cj about 52 urn long. Large, oval, lateral sclerite present, about 120 urn long at maximum length, more heavily pigmented than PY, surrounding opening of sclerotized opisthosomal gland; separated from PY by clearly accentuated, unsclerotized line. Cupules im and ip on PY, ih on lateral sclerite, ia and ips on unsclerotized integument. Humeral organ absent. Ventral region (Fig. 13): Medial margins of epimeral plates irregular. Epimeral, genital, aggenital, anal and adanal setae: 3-1-3-3; 5; 1; 2; 3, respectively. Legs: Setation as for adult, other than seta v" absent from femora I and II, and setae /" and v' absent from tarsus I (Fig. 8). Porose areas present as for adult. Tarsi monodactylous; distinct pulvillus present. Deutonymph. Prodorsal and gastronotal setae similar in shape to those of tritonymph, except smaller. Epimeral, genital, aggenital, anal and adanal setae: 3-1-2-2; 3; 1; 0; 3, respectively. Leg setation as for tritonymph, other than seta v' absent from trochanters I to IV and genua I and II, v" absent from tibiae I and II, /" absent from tibiae III and IV, /' absent from tibia IV, and (it) absent from tarsi I to III. Material examined: Holotypus (1430-HO-1992): South Africa, Natal, Drakesberg, Cathedral Peak Area, on Protea roupelliae leaves, 13.06.1990, leg. I. Pajor; 60 paratypes from the same sample. Holotype and 45 paratypes (1430-PO1992) deposited in the Hungarian Natural History Museum, 10 Paratypes in the Canadian National Collection, Agriculture Canada, Ottawa, and 5 paratypes in the Museum d'Histoire naturelle, Geneva. Remarks: 1. Adults of this species are distinguished from those of its congeners by its small body size, the body length being less than 550 urn, and the weakly developed prolamella. Adults of this species most closely resemble those of H. zumpti, a species collected in Southwest Africa and described by Sellnick (1957). However, body size, length of prodorsal and notogastral setae and dimensions of porose areas are smaller in /7. setosus than in H. zumpti. 2. Immatures of H. setosus can be distinguished from those of H. rostrolamcllatus Grandjean, the only other species of Humerobates for which immatures have been described (Grandjean 1970), by the absence of a humeral organ, and possibly the presence of a pulvillus on tarsi I to IV of immatures. As Grandjean (1970: 868) notes H. rostrolamellatus is incompletely described, with no description of the tarsi of immatures. Presence of tarsal pulvilli is not uncommon in Oribatida. Immatures of species in the cymbaeremaeid genera, Ametroproctus and Cymbaeremaeus have tarsal pulvilli. Many arboreal species in the superfamilies Lieneremaeoidea and Oripodoidea have tarsal pulvilli in both immatures and adults (Walter and Behan-Pelletier 1993). However, their presence in immatures of H. setosus is the first known occurrence in the superfamily Ceratozetoidea. 3. On the basis of Grandjean's (1970) diagnosis of Humerobates based on adult and immature characters, the species described herein must be ascribed to this genus. As Ohkubo (1982) noted, adults of species of Humerobates are similar to those of Baloghobates Hammer, a genus presently considered a member of the Ceratozetidae; the two genera differ primarily in the absence of prolamellae in Baloghobates. Baloghobates was recently synonymized with Africoribates (Balogh and Balogh 1992), and we agree with Ohkubo (1982) that the systematic position of this genus needs reanalysis.