Periplaneta australasiae
Migrated from West Africa to America in slave ships (Rehn, 1945).
Pycnoscelus surinamensis
Probably in part reached the New World by way of Africa in slave ships (Rehn, 1945).
Supella supellectilium
Reached America from West Africa by slave ship (Rehn, 1945).
Xestoblatta festae
At sea.—One female found dead in hold of S.S. Tenadores (Hebard, 1917).
AIRCRAFT
Michel (1935) stated that the development of air transportation brought the same insect dispersal problems that exist in land and water transportation; in addition, the problem of cockroach infestation had become a very serious one, quite aside from the hygienic point of view, because it had been discovered that these insects seek out the wings of airplanes, where they subsisted on the glue and dope used in airplane construction. However, Dethier (1945) found no cockroaches in dismantled or wrecked wing and tail structures of metal aircraft in central Africa. In fact, all-metal aircraft would seem to provide little in the way of food or water for stowaway cockroaches.