Cockroach-parasite
Guides
Evaniella californica
ensign wasp
Evaniella californica is a species of ensign wasp in the family Evaniidae, first described by William Harris Ashmead in 1901. The species is endemic to North America and represents one of approximately 20 recognized species in the genus Evaniella. Ensign wasps are characterized by their distinctive metasomal morphology and are known for their association with cockroach oothecae as hosts for larval development. The specific epithet "californica" suggests the type locality or primary distribution is associated with California, though records indicate broader North American occurrence.
Evaniidae
ensign wasps, nightshade wasps, hatchet wasps, cockroach egg parasitoid wasps
Evaniidae is a family of solitary parasitoid wasps commonly known as ensign wasps, nightshade wasps, or hatchet wasps. The family comprises approximately 20 extant genera containing over 400 described species, with a nearly cosmopolitan distribution excluding polar regions. Evaniidae are immediately distinctive among Hymenoptera due to their unique morphology: the metasoma (abdomen) is attached very high on the propodeum, well above the hind coxae, and is connected by a long, one-segmented, tube-like petiole. The common name "ensign wasp" derives from the characteristic habit of these wasps to jerk their small, flag-like metasoma up and down while walking. All known evaniid larvae are specialized parasitoids that develop inside the egg cases (oothecae) of cockroaches (Blattodea), consuming the host eggs.
Hyptia femorata
Hyptia femorata is a species of ensign wasp in the family Evaniidae, described by Townes in 1949. Members of this family are parasitoids of cockroach eggs, with females laying eggs into cockroach oothecae. The species is known from North America. Like other evaniids, it is characterized by a distinctive laterally compressed abdomen that is carried elevated like a flag, giving the group their common name. Specific biological details for H. femorata remain poorly documented in published literature.
Hyptia harpyoides
Hyptia harpyoides is a species of ensign wasp in the family Evaniidae, first described by Bradley in 1908. This small parasitoid wasp is known from North America, with records from Canada including Ontario. It has been documented as a parasite of Parcoblatta cockroach eggs. The species belongs to a group of wasps characterized by their distinctive abdominal morphology and cockroach egg parasitism.
Prosevania
Prosevania is a genus of ensign wasps in the family Evaniidae, first described by Kieffer in 1911. Members of this genus are parasitoid wasps, with at least one species (P. punctata) having documented biology and life history. The genus belongs to the superfamily Evanioidea, characterized by their distinctive metasomal attachment. Prosevania species are part of a group of wasps that develop as parasitoids in the oothecae of cockroaches.
Ripiphoridae
wedge-shaped beetles
Ripiphoridae is a cosmopolitan family of approximately 450 described species of beetles commonly known as wedge-shaped beetles. The family is notable for hypermetamorphic parasitoid development, a trait shared only with Meloidae among beetles. Host associations vary by subfamily: Ripiphorinae attack bees and wasps, Ripidiinae parasitize cockroaches, and Pelecotominae attack wood-boring beetle larvae. The family exhibits extreme morphological modifications including abbreviated elytra, sexually dimorphic antennae (flabellate or pectinate in males), and in some groups, wingless larviform females.