_Experimental prey._--_Periplaneta americana_, Australia (Glauert, 1946): An injured cockroach was accepted at once by the scorpion, which held the insect in its claws and tore it with the alternately moving chelicerae. The scorpion ate all the soft parts and most of the sclerotized exoskeleton. Order ARANEIDA Many observations of spiders feeding on cockroaches are quite general, and many observers have failed to identify either the spider or its prey. Belt (1874) stated that "the cockroaches that infest houses in the tropics ... have numerous enemies--birds, rats, scorpions, and spiders." When Belt tried to drive a cockroach toward a large cockroach-eating spider, the insect rushed away from him until it came within a foot of the spider when it would double back, never advancing nearer. Beebe (1925) watched a giant "wood roach," which was in the grasp of a 2-inch ctenid spider, fly through the window of his British Guiana laboratory. While the spider ate the cockroach, the insect gave birth to 51 nymphs. Sonan (1924) reported that large gray spiders devour nymphs and adults of _Periplaneta americana_ and _P. australasiae_ in Formosa; this spider also occurs on Hiyakejima Island and Okinawa. Passmore (1936), who has produced some excellent photographs of tarantulas, stated that they destroy cockroaches. Rau (1940) stated that American and oriental cockroaches were the principal item of diet of a friend's pet tarantula for several years. Kaston (personal communication, 1953) successfully fed a tarantula with _Periplaneta americana_. Bristowe (1941) found that the British species of _Ectobius_ are readily accepted by _Xysticus_, _Clubiona_, _Drassodes_, _Zelotes_, _Tarantula_, and the web-builders _Ciniflo_ and _Aranea_. The British domestic cockroaches were accepted by _Tegenaria_ and _Ciniflo_, spiders large enough to overpower them, and were useful as food for tropical avicularids, ctenids, and sparassids in captivity. Family THERAPHOSIDAE =Avicularia avicularia= (Linnaeus) and =Avicularia= sp.? _Common name._--Bird-eating spider. _Natural prey._--_Periplaneta americana_, Trinidad (Main, 1924, 1930): The remains of the host were compressed into globular form by the spider after it had extracted the nutritive parts. =Phormictopus cancerides= (Latreille) _Experimental prey._--Cockroach, West Indies (Wolcott, 1953). Family SPARASSIDAE =Heteropoda venatoria= (Linnaeus) _Synonymy._--_Heteropoda regia_ Fabricius. _Common names._--Banana spider (Comstock, 1912); huntsman spider (Gertsch, 1949); big brown house spider (Bryan, 1915). _Natural and experimental prey._--Cockroaches, Bermuda (Verrill, 1902); Puerto Rico (Sein, 1923; Wolcott, 1924a; Petrunkevitch, 1930a); Hawaii (Bryan, 1915, Williams et al., 1931); British Guiana (Moore _in_ Williams et al., 1931); Panama (Gertsch, 1949); New Zealand (adventive) (Parrott, 1952); England (Cloudsley-Thompson, 1953); Comstock (1912); Hawaii (Pemberton, 1917).