THE GROUPS, SUBGROUPS, COMPLEXES, AND SPECIES OF GENERA CULEX AND LUTZIA A brief account of the classification and biology of the Culex and Lutzia in Thailand

Most records of Culex and Lutzia from Thailand refer to nocturnal feeding on mammals, eg, humans, cows, and dogs. The periodicity of nocturnal feeding varies greatly depending on the species. Culex (Cux.) quinquefasciatus, for example, are fairly abundant in urban areas throughout the year and are commonly found resting during the day in shade outdoors, and on walls, dark corners, in cabinets, bathrooms, and under chairs and tables in houses. Females are vicious biters at night indoors and outdoors and feed principally on blood of man and dogs from sunset until dawn. Many species of Culex have been collected in large numbers at night in cowsheds, in light traps or animalbaited traps, and biting cows, pigs, and occasionally humans. Infrequently, Cx. (Eum.) species, Cx. (Lop.) infantulus, Cx. (Lop.) rubithoracis, and other Cx. (Lop.) species, as well as Lt. (Mtl.) fuscana, are caught attacking humans. Little is known about the adult biology and medical importance of species in subgenera Culiciomyia, Eumelanomyia, Lophoceraomyia, and Oculeomyia of Culex, and Metalutzia of Lutzia.