A survey for hymenopteran parasites of the eggs ofPeriplaneta americanaL.,P. brunneaBurmeister,P. fuliginosa(Serville), andBlatta orientalisL. conducted in 17 Texas and 4 Louisiana cities during 1974–75 revealed the existence of 2 primary parasites,Tetrastichus hagenowii(Ratzeburg) andEvania appendigaster(L.). Parasitization rates at the survey sites ranged from 0–68% ($\tt\ \bar x$= 26%).T. hagenowiiwas found at the majority of the Texas and all of the Louisiana sites and accounted for 99.4% of the total parasitism. Only 4 specimens ofE. appendigasterwere recovered fromP. americanaoothecae collected from 2 Texas localities.T. hagenowiiparasitized oothecae deposited at heights up to 3 m in either concealed or unconcealed locations.