A very large and quite handsome mosquito having a feast on Stephen's arm. According to Bug Guide: "one of the largest mosquitoes in the U.S. Not known to vector any mosquito-borne pathogens."

A paper from the Univ. of Florida says: "The proclivity of Psorophora ciliata larvae to consume other mosquito larvae, including pestiferous species such as Aedes albifasciatus (Macquart)(Campos et al. 2004), Aedes vexans (Meigen), and other floodwater mosquitoes (Breeland et al. 1961), has led to suggestions of using this species as biological control agent of pest and vector mosquitoes (Howard et al. 1917, Gladney and Turner 1969)." However, they concluded this species doesn't occur in large enough numbers to have an impact.