Los enviados de Belcebú: Moscas y mosquitos (Diptera) exóticos con interés médico y veterinario en México

We present the main reasons involved in the introduction of species into new geographical areas, and the impact of their presence in the environment, ecosystems and human welfare. Exotic insects of order Diptera are extremely important from the social and economic point of view. A preliminary commented list of 22 species of invasive flies and mosquitoes of medical and veterinary importance in Mexico, and their possible impacts to health, economy and ecosystem conservation is presented. We explain the importance of taxonomy, faunistic studies, and entomological surveillance in the country, with special interest on borders to detect, control or limit their distributions.