_Oviposition._--A female _P. punctata_ selected oöthecae of _P. americana_ for oviposition and ignored those of _B. orientalis_ and _Parcoblatta pensylvanica_ in the same cage. Oviposition was accomplished as described for _Evania appendigaster_. One oötheca was turned over onto its right side by the wasp before she oviposited. (Edmunds, 1952.) Although there seemed to be a "preferred" position for oviposition, it was not obligatory. The usual position was for the female to face the keel of the oötheca, but she also oviposited from the opposite side or, rarely, directly down into the side of the oötheca. The average time spent by females in 10 ovipositions was 29 minutes (range 16-62 minutes). The wasp apparently could not determine whether the eggs had been previously parasitized. The wasp laid her egg between the cockroach eggs rather than in them and she oviposited into oöthecae that had just been dropped and those two weeks old or older. On three occasions nymphal cockroaches emerged within a few hours after the wasp had oviposited. (Edmunds, 1954.) Apparently, for successful parasitization the wasp must oviposit before the cockroaches have reached the final stages of preemergence development. Edmunds (1954) placed females of _Periplaneta americana_ that were carrying oöthecae, into cages with _Prosevania_; some of the female wasps showed considerable interest in the attached oöthecae, but he observed oviposition only into egg cases that had been dropped by the cockroaches. Cros (1942) described an interesting reaction that he called "instinctive hostility" of the oriental cockroach toward _Prosevania_. A wasp was placed in a jar in which a cockroach had just deposited its oötheca. The wasp tried to oviposit into the egg case but was upset and pursued by the cockroach. The cockroach placed herself over the oötheca, standing high on her legs, and remained there motionless. The wasp then approached from the rear, slipped under the cockroach, and, unnoticed by the cockroach, climbed on the oötheca and oviposited successfully. _Development._--In _Blatta orientalis_: The developmental period was completed in 40-57 days in summer and fall (Cros, 1942). Time from oviposition to emergence of adult varied from 45-177 days; three parthenotes from an oviposition by an unfertilized female wasp developed in 45-53 days (Edmunds, 1954). In _Blattella germanica_: Almost 4 weeks spent in development (Fahringer, 1922). In _Periplaneta americana_: Three wasps developed in 127 days (Edmunds, 1952). Only one parasite develops in each oötheca. There were three generations a year in Ohio. (Edmunds, 1954.) In Algeria there were two to three generations per year. The adult emerged from the oötheca through a hole 4 mm. in diameter. (Cros, 1942.) Parthenogenesis exists; the unfertilized eggs produced only males (Edmunds, 1954). _Distribution._--Eastern U.S.A., from New York and Ohio south to Georgia (Townes, 1949). Europe, Syria, Palestine (Kieffer, 1920).