The suillus species-group of the genus Neolophonotus, containing 52 species, is dealt with; 34 new species are descriptionbed. New species: anomalus, antidasophrys, atopus, bezzii, bimaculatus, braunsi, carorum, chaineyi, crassifemoralis, crinitus, depilis, dondoensis, hara, hessei, io, irwini, kolochaetes, ktenistus, lightfooti, louisi, macquarti, macromystax, manselli, pilosus, pinheyi, rossi, seymourae, soutpanensis, stuckenbergi, tanymedus, variabilis, zambiensis, zogreus, zopherus. New synonyms: Lophonotus cupreus Loew, 1858 = Lophonotus flavibarbis Macquart, 1838; Lophonotus ursinus Schiner, 1867 = Lophonotus leoninus Schiner, 1867; Neolophonotus obtusus Hull, 1967 & Neolophonotus robustus microspinosus Hull, 1967 = Dysmachus robustus Ricardo, 1922; Asilus chalcogaster Wiedemann, 1819, & Dysmachus americanus Macquart, 1846 = Dasypogon suillus Fabricius, 1805.