Physogastric
Guides
Hornia
Hornia is a genus of blister beetles (Meloidae: Nemognathinae) established by C.V. Riley in 1877. Species in this genus exhibit pronounced sexual dimorphism, with females being physogastric—the abdomen becomes greatly distended, an adaptation associated with reproductive biology. The genus is rarely collected and poorly known biologically, with most information derived from scattered historical records and limited laboratory observations.