Distribution.—Tropical and subtropical parts of the world as far north as New York City, and all of Europe except the northern part (Kieffer, 1920; Townes, 1949). The wide distribution of Evania has been attributed to the abundance of host cockroaches on ships between the Tropics (Haldeman, 1847). Kieffer (1903) appears to have shown some correlation between the numbers of species of cockroaches found in various geographical regions and the numbers of species of evaniids found in similar regions. However, the number of blattids he listed is small.
Evania dimidiata Fabricius
Synonymy.—Evania abyssinica Westwood [Schletterer, 1889].
Natural host.—Blatta orientalis, Egypt? (Alfieri, 1914).
Evania subspinosa Kieffer
Natural host.—Periplaneta sp., Fiji (Lever, 1946): Although Lever (1946) listed this species as a cockroach-egg parasite, he did not state that he actually reared it from Periplaneta oöthecae.
Hyptia dorsalis of Ashmead
Synonymy.—Dr. H. Townes, (personal communication, 1956) believes that this wasp was probably either H. reticulata, H. harpyoides, or H. thoracica; it is not possible to tell which without reexamining Ashmead's specimens; these apparently have been lost.
Natural host.—Parcoblatta pensylvanica, U.S.A., Mississippi (Ashmead, 1900).