S. Mahunka szerk.: Folia Entomologica Hungarica 60. (Budapest, 1999)

28 (27) Lamellar setae short: as long as or only slightly longer than rostral setae; directed laterad. 29 (30) Lamellar setae originate on arched ridge. Rostral setae short and straight, directed antero-laterad. L.: 1050-1160 urn. (Fig. 20). - Peru, 2150 m. Rhynchoribates fabulosus Beck, 1961 30 (29) Lamellar setae originate on surface of prodorsum. Rostral setae longer with a laterally curved tip. L.: 1113 urn. (Fig. 21). - Bolivia, 1800 m. Rhynchoribates spectabilis Balogh et Mahunka, 1969 31 (26) Interlamellar setae rod-shaped with an obtuse tip. 32 (33) Lamellar setae longer than interlamellar setae, with a flagellate tip. L.: 740 urn. (Fig. 22). - Venezuela Rhynchoribates rostratus Grandjean, 1929 33 (32) Lamellar setae shorter than interlamellar setae, setiform with a straight tip. 34 (35) Rostral setae rod-shaped, curved mediad. Lamellar setae originate on transversal sclerotized ridge. L.: 900 um. (Figs 23-24). - Brazil: Amazonia Rhynchoribates amazonicus Woas, 1986 35 (34) Rostral setae thin, setiform, with a laterally directed tip. Lamellar setae originate on surface of prodorsum. 36 (37) Medial part of prodorsum with rough reticulation, lateral part tuberculate. Interlamellar setae smooth, with a clavate end, bothridial setae extremely flagellate. L.: 724 urn. (Fig. 25). - Bolivia Rhynchoribates edentatus Balogh et Mahunka, 1969 37 (36) Medial part of prodorsum without throughout reticulation, lateral part tuberculate. Interlamellar setae very long, throughout dentate, apically slightly spathulate. L.: 734 (im. (Fig. 26). - Bolivia Rhynchoribates spathulatus Balogh et Mahunka, 1969 38 (25) Rostral part of prodorsum abruptly narrowing, then with almost parallel sides; at the niveau of rostral setae 4-6 long teeth close to each other. 39 (40) Large species: 1350 mm. Rostrum with 2-3 extremely small marginal teeth. (Fig. 27). - Peru, 2200 m. Rhynchoribates grandis Hammer, 1961 40 (39) Smaller species: 500-940 \xm. Rostrum with 2-6 easily visible marginal teeth. 41 (42) Most of prodorsal surface densely tuberculate. Rostral setae curved lateral. Lamellar setae originate on two separate ridges. L.: 780-940 urn. (Fig. 28). Peru, 2150 m. Rhynchoribates mirus Beck, 1961 42 (41) Prodorsum not densely tuberculate ornamented with sclerotized ridges or rough, irregular reticulation. 43 (44) Interlamellar setae setiform with a pointed tip. L.: 771-898 pm. (Fig. 29). Ecuador, 2750 m. Rhynchoribates ecuadoriensis P. Balogh, 1988 44 (43) Interlamellar setae bacilliform with an obtuse tip. 45 (46) Prodorsum with large polygonal reticulation. Tip of rostrum narrow, almost rod-shaped. L.: 500 p.m. (Fig. 30). - Brazilia: Amazonia Rhynchoribates dilatatus Balogh et Mahunka, 1969 46 (45) Prodorsum with some sclerotized ridges. Tip of rostrum elongately triangular. L.: 630 urn. (Figs 31-32). - Brazil: Amazonia Rhynchoribates brasiliensis Woas, 1986