Se presenta una lista de las especies de hormigas para México, con base en revisión de literatura. Para cada especie se menciona el estado del país en el que se registra y la fuente de donde proviene la información. Se tiene un total de 884 especies de hormigas, pertenecientes a 86 géneros, 33 tribus y once subfamilias. Los estados con el mayor número de especies son Veracruz con 283, Chiapas con 148 y Baja California con 146; en los estados que se registra la menor cantidad de especies son Tlaxcala con dos, Aguascalientes con nueve y Distrito Federal y Querétaro con 13 cada uno. Para 81 especies no se registra localidad o estado. Las subfamilias con el mayor número de especies son Myrmicinae con 459 y 39 géneros, Formicinae con 181 especies y doce géneros; mientras que las subfamilias menos diversas son: Heteroponerinae que esta representada por dos especies y un género y Amblyoponinae con cinco especies y dos géneros. El género Pheidole tiene el mayor número de especies, 132; seguido de Camponotus con 91 y Neivamyrmex con 45. Cinco géneros agrupan el 40% de las especies conocidas para México mientras que 18 géneros cuentan con una especie cada uno, lo que representa el 2%. Atta mexicana se encuentra en 22 estados, Pseudomyrmex pallidus en 21, Pogonomyrmex barbatus en 20, Solenopsis geminata en 16 y Paratrechina longicornis en diez; 268 especies se conocen para un solo estado. Se tienen registradas seis especies fósiles

Ants are eusocial insects of wide functional and taxonomic diversity, with worldwide distribution in various terrestrial ecosystems (some introduced by man), with the exception of the poles and in the high mountain peaks. About 15,947 species have been described. In Mexico, 973 are known within 94 genera, and for the state of Durango 60 species are registered within 25 genera. However, the Formicidae knowledge in Durango State is limited as it has received little attention; this is mainly due to the lack of specialists, as well as the territorial extension of it. In order to know the myrmecofauna of the state of Durango, collections were made every 15 days between August 1, 2016 and August 1, 2017, in 56 sites in 19 municipalities located in different ecoregions of the State. Forty (40) species belonging to 24 genera were collected; the Myrmicinae subfamily was the most diverse with 21 species, followed by Formicinae (12 spp.), Dolichoderinae (5 spp.) and Dorylinae and Ponerinae with one species each. Ten (10) more ant species are registered for the state of Durango, the richness increasing from 60 to 70 species and from 25 to 32 genera. This study represents the first effort to know the myrmecofauna of the state of Durango, Mexico.

The long-legged ant, Anoplolepis gracilipes, is a widespread pest in moist lowlands of the Paleotropics, known for population explosions particularly on islands. The only Neotropical populations occur in Mexico, first reported >120 years ago from Baja California Sur. It has since spread south through much of western Mexico, but was seemingly prevented from expanding eastward by the arid steppe climate of the Central Mexican Plateau. Here, we report records of continued spread of A. gracilipes in Mexico, including into central and southeastern regions. It is now known from 13 states (in order of earliest record): Baja California Sur, Sinaloa, Nayarit, Colima, Guerrero, Jalisco, Aguascalientes, Quintana Roo, Michoacán, Yucatán, México State, Chiapas, and Veracruz. There now seem to be no natural barriers preventing its further spread through moist tropical lowlands of Central and South America. From there, A. gracilipes may spread to Caribbean islands, where its ecological impact could be disastrous.

The canopy of the Neotropical forest hosts a wide diversity of arthropods, where ants represent one of the most abundant and diverse groups. This diversity may be due to the preference of some insect species for certain species of trees. In order to determine the diversity of ants and their patterns of association with trees, nine tree species of two zones (soils based on limestone or volcanic rock) of the tropical dry forest were chosen in San Andrés de la Cal, Tepoztlán, in Morelos state, Mexico. Ants were collected directly from the branches of 5–10 individuals per tree species or by using pitfall traps. Estimated sampling efficiency was 96%, and a total of 27 species of ants belonging to 13 genera and 6 subfamilies were found. Of these species, 56% are tree-dwelling while the rest are generalist species that climb the trees to forage in the canopy. Ant species richness differed among tree species, with a gradient from Ipomoea murucoides with the highest richness, to Bursera fagaroides with the lowest. No differences were found among the tree species in terms of the composition of ant species, but 44% of the species were found in one forest zone only and one species was found more frequently in one zone than in the other. With the information generated in this study, eight species and one genus (Tapinoma) have been added to the 89 species and 29 genera recorded in the state of Morelos. While ant species composition did not differ among tree species, the difference in richness suggests that three of the studied tree species offer a greater provision of resources to the ants and that the floristic differences between forest zones generate different ant assemblages.