1. The original type material of Trombicula minor Berlese rgos, generic type of Trombicula and representative of the family Trombiculidae, consisted of two specimens of postlarval trombiculids mounted on one slide plus (probably) fragments from a third specimen, ali assumed to be identical. Of the two specimens on one slide, one was a complete adult, the other was greatly distorted. These specimens, from bat-guano in a cave or caves in jAVA, probably represented at least two species and probably included fragments of a nymph as well as an adult female. 2. Carl WILLMANN (1941) was the first reviser. He redescribed the complete adult female, containing an egg, and this specimen must be regarded as the lectotype. 3· The slide bearing the lectotype has been destroyed. 4· Sorne fragments (one palp and legs of a nymph), apparently regarded as conspecific by BERLESE, are unidentifiable and have been described as Trombicula sp. indet. l>y VERCAMMEN-GRANDJEAN, Aunv and PEGAZZANO (1965), not precisely topotypic. 5. The neotype designated by CüüREMAN (rg6o) from an adult (?) from a cave in AFGHANISTAN is considered invalidated (a) for taxonomie reasons, as differing morphologically from the original descriptions too widely to be acceptable, and (b) for nomenclatorial reasons. 6. Nomenclatorial reasons for invalidating CooREMA?-: s neotype designation concern neglect of severa! mandatory provisions of the Rules of Zoological Nomenclature, especially failure to respect the need to stabilize the classification of the family, which is based on larval characters of the parasitic larvae and not on the adults - stabilization of classification being the prime requisite of neotype designations. The description and figures of CooREMAN suggest sorne relationship to Myotrombicula. The invalidated neotype from AFGHANISTAN has accordingly been renamed Myotrombicula dilarami, nomen novum for T. minor, Cooreman 1960 nec Berlese 1905. 7· A neotype of Trombiwla minor Berlese is designated as a larva from a tomb-bat, Taphozous affinis, from a cave in MALAYA. A series has been reared to nymphs and adults and the species is described in all three stages. This is the same material as has been discussed as a potential neotype since 1954, on which the relationship of the genus Trombicula have been based by VERCAM:WEN-GRANDJEAN (1960) and others. 8. The neotype, larva No. CORU. 102934/r, has been deposited in the U. S. National Museum (no number) and 84 larvae, 16 nymphs (7 with paired larval exuvia), and the 3 adults have been distributed to a number of institutions and acarologists.