The knowledge about the geographical distribution of Aedes patersoni Shanon and Del Ponte, Ae. scapularis (Rondani), Culex dolosus (Lynch Arribálzaga), Mansonia indubitans Dyar Shannon, Psorophora cingulata (Fabricius), Toxorhynchites haemorrhoidalis separatus Tx. purpureus (Theobald), theobaldi s. l. & Knab Uranotaenia lowii Theobald in Northwest Argentina is extended. Likewise, they provi...

The behavior of females of a species of Megaselia is described. Females perch on leaves and occasionally "dance", fluttering their wings while rapidly running on the leaf surface. During this dance, they evert bright white abdominal sacs that apparently constitute part of a visual display to attract males. The evolutionary basis of these behaviors is discussed.