_Natural host._--"Kakkerlac," Philippine Islands (Sonnerat, 1776): Nesting sites are readymade crevices. The wasp seizes the cockroach by an antenna and stings the host many times in the "abdomen." She drags the cockroach by an antenna to the nest, and, after depositing her egg, plugs the opening with moistened earth. =Dolichurus bicolor= Lepeletier _Synonymy._--Schulz (1912) considered this to be _Dolichurus corniculus_. Berland (1925) stated that this is possibly a color variety of _D. corniculus_. Soyer (1947), from a study of the behavior of the wasps, believed that both _D. bicolor_ and _D. haemorrhous_ are varieties of _D. corniculus_. Krombein (personal communication, 1956) stated that _D. corniculus_ and _D. bicolor_ differ in characters other than color alone and that _D. bicolor_ is considered a valid species today. _Natural host._--Cockroach, France (Benoist, 1927): The wasp was observed closing the entrance to its burrow. Its egg was attached to the coxa of the midleg of the cockroach. Maneval (1932) stated that _D. bicolor_ is found at the edge of dry woods along with _D. corniculus_ and that the wasp will also accept the prey of _D. corniculus_ if presented to it. =Dolichurus corniculus= (Spinola) _Synonymy._--_Dolichurus haemorrhous_ Costa [Schulz, 1912]. Berland (1925) listed _D. haemorrhous_ separately but stated that it is perhaps a color variety of _D. corniculus_. _Natural hosts._--_Blattella germanica_, France (Benoist, 1927). _Ectobius lapponicus_, Germany (Sickmann, 1893); Denmark (Nielsen, 1903); Sweden (Adlerz, 1903); Italy (Grandi, 1931, 1954); France (Benoist, 1927; Maneval, 1928). _Ectobius pallidus_, France (Maneval, 1932; Soyer, 1947). _Ectobius panzeri_, France (Soyer, 1947). _Ectobius_ sp., Italy (Grandi, 1954). _Hololampra punctata_, Pitten (Handlirsch, 1889). _Loboptera decipiens_, France (Ferton, 1894). Cockroach, Netherlands (Bouwman, 1914). _Nesting sites._--The wasp uses already-made cavities such as rotting dead branches on ground, fissures in the earth, abandoned ant holes, chinks in stone, or the empty cocoon of the ichneumon _Ophion luteus_ (Ferton, 1894; Maneval, 1932). _Behavior._--The prey is immobile while being dragged to the nest but recovers sufficiently from the sting so that if dug up it will run around (Ferton, 1894; Bouwman, 1914; Benoist, 1927; Grandi, 1954). The wasp cuts off about two-thirds of the cockroach's antennae prior to putting its prey in its nest (Adlerz, 1903; Bouwman, 1914; Soyer, 1947). One cockroach is placed in the nest and the wasp's egg is attached to the midcoxa (Ferton, 1894). Oviposition takes 5 to 6 minutes (Maneval, 1939). Wasp fills and seals its nest with bits of earth and stones (Ferton, 1894; Grandi, 1954). The wasp larva feeds externally and devours the entire cockroach, including its exoskeleton (Ferton, 1894).