Excerpt from the linked content^1,2 by Greg Allen:

>The mosquito — known by its scientific name of Culex lactator — is typically found in Central and South America. Researchers with the University of Florida Medical Entomology Laboratory first discovered it in a rural area near Miami in 2018.

>It's since spread to other counties in Southwest Florida.

>It's not known how the new mosquito was introduced into Florida. Scientists say climate change appears to be a factor that's making the state and other parts of the U.S. welcoming to non-native mosquitoes that can carry diseases.

>Mosquito biologist Lawrence Reeves is the lead author of a report on the newly-discovered species, published Wednesday in the Journal of Medical Entomology.

>He says, "There are about 90 mosquito species living in Florida, and that list is growing as new mosquito species are introduced to the state from elsewhere in the world."

>Reeves says little is known about Culex lactator, but it bears further study. It's a member of a group of mosquitoes known to carry the West Nile and St. Louis Encephalitis viruses.

>The U.S. faces public health challenges related to diseases like West Nile, dengue, and chikungunya, all of which are spread by non-native mosquitoes that have become established here.

>Reeves says, "We need to be vigilant for introductions of new mosquito species because each introduction comes with the possibility that the introduced species will facilitate the transmission of a mosquito-transmitted disease."

^1 A new tropical mosquito has come to Florida, 22 Mar. 2023, https://www.npr.org/2023/03/22/1164937874/uh-oh-a-new-tropical-mosquito-has-come-to-florida-the-buzz-its-creating-isnt-goo

^2 Lawrence E Reeves, Kristin E Sloyer, Kara Tyler-Julian, Rebecca Heinig, Atom Rosales, Candelaria Domingo, Nathan D Burkett-Cadena. Culex (Phenacomyia) lactator (Diptera: Culicidae) in southern Florida, USA: a new subgenus and species country record. Journal of Medical Entomology, 2023; tjad023. https://doi.org/10.1093/jme/tjad023