In the foothills of the Laramie Mountains in southeast Wyoming, the little-known seed bug, Botocudo modestus (Barber), occurs in discrete, local populations that interact as part of a metapopulation. Habitat for adults and nymphs consists of pockets of litter under the canopies of ponderosa pine trees. The metapopulation is likely maintained by macropterous morphs, which comprise about half of the adults. Botocudo modestus overwinters as adults and is univoltine. Reproduction occurs in July through August in the same litter occupied year round by the adults. The nymphal instars are described. In addition to B. modestus, new Wyoming state records are reported for Neosuris castanea (Barber), Nysius raphanus Howard, Slaterobius insignis (Uhler), and Sisamnes claviger (Uhler).