Genus Culex is a group of mosquitoes known for their ability to transmit diseases to humans. In the scientific community, they are commonly referred to as simply "Culex". However, there are several synonyms for this genus. One such synonym is the term "Holoarctic culicines", which refers to the broad geographical range of Culex species. Other synonyms include "Encephelomyia", which is a genus that was once considered part of Culex, as well as "Melanoconion" and "Rubripectus", both of which are subgenera within Culex. Regardless of the name used, it is important to be aware of the potential health risks associated with these mosquitoes.