Dyar (H. G.) & Knab (F.). The Genus Culex in the United States 

 (Diptera, Culicidae). — Insecutor Inscitiae Menstruus, Washington^ 

 D.C., V, nos. 10-12, October-December 1917, pp. 170-183. 



In this paper the authors deal with the synonymy of the species of 

 Culex, sens, lat., of the southern United States, and correct some 

 details of nomenclature that have appeared in their monograph. Keys 

 to the sub-genera based on the male genitaha and to species based on 

 colouration are given. 



The following species are dealt with : — Culex (Neoculex) saxatilis, 

 Orossbeck (C territam, How., D. & K., nee Walk.), the larvae 

 occurring in j)ermanent swamps and pools in more or less wooded areas. 

 This species, of which the adults do not bite warm-blooded animals, 

 but attack frogs, is restricted in the west to forested areas. 



The genus Culex, sens, strict., is represented by C. corniger, Theo., 

 ^\^th an essentially tropical distribution ; C. tar sails, Coq., common in 

 the arid regions of the west, the larvae being found in all sorts of 

 permanent or semi-permanent stagnant water containing vegetation ; 



C. stigmatosoma, Dyar, confined to the Pacific coast and found in 

 temporary pools without vegetation ; C. erythrothorax, Dyar, from the 

 southern part of California, the larvae living in sloughs of permanent 

 deep water ; C. salinarius, Coq., which is absent from Florida and has 

 not been recorded from the Gulf coast, being elsewhere common in 

 open marshes, especially near the sea, though it does not require even 

 slightly saline water ; C. palus, Theo. {similis, Theo.), which inhabits 

 the West Indies and southern Florida, the larvae being found in 

 permanent or semi-permanent pools, especially in coral rock, but not in 

 artificial receptacles ; C. restuans, Theo. {brehniei, Knab), extending 

 from Canada to Florida, the larvae being found in foul stagnant water, 

 such as in rain-barrels and old tins. Though C. territans. Walk., 

 appears to be the oldest name for this species according to Edwards, 

 Walker's description does not apply and the name has long been used 

 ior C. saxatilis, Grossbeck {q.v.) ; C. fatigans, Wied. {quinquefasciatus, 

 Say), widely dispersed by commerce over the warmer parts of the 

 globe, is a semi-domesticated species, the larvae being numerous in 

 all artificial collections of water near human habitations, and less 

 common in natural pools in the open country ; C. pipiens, L. {comitatus, 



D. & K.), probably introduced by commerce from Europe, the larvae 

 being found in artificial collections of water and in stagnant pools. 



The sub-genus Melanoconion, Theo., is represented by Culex 

 {Melanoconion) erraticus, D. & K. {ahominator, D. & K.), a species 

 inhabiting the Mississippi valley ; C. {M.) peccator, D. & K. 

 {incriminator, D. & K.), a species of which the larvae and life-habits 

 are unknown; and C. (M.) anips, Dyar, known only from southern 

 CaUfornia, where the larvae are found in pools of permanent water. 



The sub-genus Mochlostyrax is represented by C. (M.) egberti, 

 D. & K., from Florida, the male, larva and life-history being 

 unknown; C. {M.) floridanus, D. & K. {cubensis, D. & K., agitator, 

 D. & K., deceptor, D. & K., mastigia, H. D. & K.), inhabiting 

 southern Florida and Cuba, where it lives in permanent water with 

 aquatic vegetation, either hanging itself up on leaves or lying on the 

 bottom, seldom coming to the surface ; C. (M.) peribleptus, sp. n., 

 from South Carolina ; and C. (M.) pose, sp. n., from Texas. 



