About Pepsis mexicana Lucas, 1895
Pepsis mexicana is a tarantula-hawk wasp species. Research-grade observations of this species, including those documented with images on iNaturalist, show that adult wasps of this species have a black body that usually carries a metallic-blue sheen. If their wing tips have not worn down from use, they display distinct white edges along their apexes. This combination of overall wing color and the narrow white border at the wing apex sets Pepsis mexicana apart from all other tarantula-hawk wasp species. Males of the species reach approximately 20 millimeters, which is equal to about 3/4 of an inch, in length, while females are around 3 millimeters, or roughly 1/8 of an inch, longer than males. Though all wasps in the genus Pepsis count among the largest wasps found anywhere in the world, Pepsis mexicana, the Mexican Tarantula-hawk Wasp, is considered a small to medium-sized species when compared to other species within the genus Pepsis.
This species has a distribution that ranges from the Southwestern United States, specifically covering the Mojave Desert in southern California, the Sonoran Desert in southern Arizona, and the Chihuahuan Desert in western Texas, southward through Mexico and Central America, all the way to Costa Rica. In the Mexican state of Chiapas, this species can be found at elevations as high as 2500 meters, or 8200 feet.
