Alberto A. GUGLIELMONE is a Senior Scientist in Parasitology at the Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria, and Superior Scientist at the Consejo Nacional de Investigaciones Científica y Técnicas, ruta 34 km 227, 2300, Rafaela, Santa Fe, Argentina. E-mail: guglielmone.alberto@inta.gob.ar  Richard G. ROBBINS is an Emeritus Civilian Medical Entomologist at the Walter Reed Biosystematics Unit, Department of Entomology, Smithsonian Institution, MSC, MRC 534, 4210 Silver Hill Road, Suitland, MD 20746-2863, USA. E-mail: robbinsrg@si.edu

• Acknowledgement.- Introduction.- Methodology.- 1. Tick species found feeding on humans.- 2. Tick species wrongly considered parasites of humans.- 3. Invalid species recorded from humans (synonyms, incertae sedis, nomina dubia, nomina nuda).- Commens and conclusions.- References

Alberto A. GUGLIELMONE is a Senior Scientist in Parasitology at the Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria, and Superior Scientist at the Consejo Nacional de Investigaciones Científica y Técnicas, ruta 34 km 227, 2300, Rafaela, Santa Fe, Argentina. E-mail: guglielmone.alberto@inta.gob.ar  Richard G. ROBBINS is an Emeritus Civilian Medical Entomologist at the Walter Reed Biosystematics Unit, Department of Entomology, Smithsonian Institution, MSC, MRC 534, 4210 Silver Hill Road, Suitland, MD 20746-2863, USA. E-mail: robbinsrg@si.edu

• Acknowledgement.- Introduction.- Methodology.- 1. Tick species found feeding on humans.- 2. Tick species wrongly considered parasites of humans.- 3. Invalid species recorded from humans (synonyms, incertae sedis, nomina dubia, nomina nuda).- Commens and conclusions.- References