title: Identifying Psorophora horrida females in North Carolina (Diptera:Culicidae).
abstract: Morphological characters to separate Psorophora horrida (Dyar and Knab) and Psorophora ferox (Von Humboldt) females are identified and defined. In addition to the 3 characters used to separate these 2 species in published keys, an additional 6 characters were found. Of the total of 9 characters identified, 6 are reliable at the 100% level, based on North Carolina specimens. These additional characters will assist greatly in identifying Ps, horrida specimens. Variation or hindtarsomere 4 of Ps. horrida, consisting of dark-scaled patterns, were also noted. Characters for separating Psorophora cyanescens (Coq.) and Psorophora mathesoni Belkin and Heinemann from Ps. ferox and Ps. horrida are discussed.
authors.affiliation: Public Health Pest Management Section, NC Department of Environment, Health and Natural Resources, Winston-Salem 27107, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Harrison
authors.forename: P B
authors.initials: PB
authors.lastname: Whitt
mesh_terms: D000818:Animals; D009033:Culicidae / Q000145:classification*; D005260:Female; D009657:North Carolina