Abstract: Phlebotominae sand flies are the vectors of several species of Leishmania, which are the etiological agents of leishmaniasis. In Mexico, the southeastern region is endemic to this disease and therefore many studies have been focused in that area. However, cases of leishmaniasis also occur in other Mexican states such as Coahuila, Nuevo León and Tamaulipas located in the northeast region bordering the USA. In Nuevo León, cases of cutaneous leishmaniasis have been reported intermittently through the years. Few records of sand fly species exist for this state and many municipalities remain unsampled despite the potential importance of the disease in certain regions. The main objective of this work was to undertake sand fly catches in the municipality of General Zuazua, Nuevo León, which has had a rapid urbanization process in the recent years. A location was selected to conduct catches of sand fly species using CDC light traps in the period of 6th August through 26th September 2020. Nine samplings were carried out finding 137 specimens belonging to four genera and five species. The most predominant species was Lutzomyia diabolica that represented 90.51%. It was found that sand fly species had a peak at sampling 5 (34.31%) and that abundances between samplings were significantly different. Trap location was also found to be significant different between sites. Using Taylor´s power law, it was found that spatial distribution was aggregated. None of the measured environmental variables such as air temperature, soil temperature, relative humidity, dew point or wind speed had a significant relationship to sand fly abundances. All five sand fly species found in this study are new records to the municipality of General Zuazua, Nuevo León being these Dampfomyia anthophora, Micropygomyia apache, Micropygomyia californica, Psathyromyia texana and Lutzomyia diabolica. Micropygomyia californica is recorded for the first time in México.
