Natural hosts.—Parcoblatta virginica, U.S.A., Ohio (Edmunds, 1952a, 1953a, 1954).
Parcoblatta pensylvanica, U.S.A. (Muesebeck, 1958).
Parcoblatta uhleriana, U.S.A., Natick, Mass.: Oötheca collected by L. Roth, May 17, 1956; wasp emerged June 12, 1956 (pl. [33], B); determined by Dr. H. Townes. The keel region of the oötheca of P. uhleriana (pl. [18], B) is different from that of any other species of Parcoblatta (Hebard, 1917; Lawson, 1954) so there can be no doubt as to the species of cockroach parasitized by this wasp.
Development.—The last instar larva overwinters inside the cockroach oötheca (Edmunds, 1954). Five oöthecae yielded one parasite each (Edmunds, 1953a).
Distribution.—Canada, Ontario. U.S.A.: New Hampshire and Minnesota to South Carolina, Mississippi, Texas, and Kansas. Upper and Lower Austral Zones (Townes, 1951).
Hyptia reticulata Say
Natural host.—Parcoblatta pensylvanica, U.S.A., Missouri (Rau, 1940).
Adult wasps have been taken on parsnip, Pastinaca sativa (Robertson, 1928).
Distribution.—U.S.A.: Pennsylvania to Florida and Louisiana. Mexico. Upper Austral to Tropical Zones (Townes, 1951).