This (pl. 30, A) is a tropical species frequently imported into northern localities with bunches of bananas (Comstock, 1912; Cloudsley-Thompson, 1953). Adults measure 3 to 4 inches across with bodies over an inch long. They seldom leave their resting places during the day, but are active at night and search for food. The female does not spin a web (Bryan, 1915; Gertsch, 1949). The spider turns the cockroach over onto its back at the instant of seizure and holds it firmly against the substrate. The cockroach dies in 10 minutes and is gradually rolled up by the spider as it sucks out the nutriment (Moore _in_ Williams et al., 1931). The spider does not attempt to bite when captured, but if it does, its bite is said to be painful but not dangerous (Cloudsley-Thompson, 1953). Zimmerman (1948) found scores of _Periplaneta australasiae_ breeding in rock piles in Hawaii; also present were large numbers of these spiders and centipedes which presumably preyed upon the cockroaches. Family THERIDIIDAE =Latrodectus indistinctus= Pickard-Cambridge _Common name._--Button spider. _Natural prey._--_Karnyia discoidalis_, South Africa, Western Cape Province (Hesse, 1942): The nest is constructed on the ground among grass stems or other vegetation. Preferred sites are slight hollows, hoof imprints, etc. Nests are roughly tubular. The remains of insects are entangled in the walls of the nest where they form dense accumulations. Predatory activities of the spider are limited to an area close to the tubular entrance to the nest and do not extend beyond the trapping strands near the entrance. Capture is dependent upon accidental contact of the insect with sticky threads surrounding the entrance. This spider apparently attacks any insect or arachnid that becomes entangled in the nest. In an examination of 40 nests, remains of 6 _K. discoidalis_ were found. =Latrodectus mactans= (Fabricius) _Common names._--Black widow, hourglass, or shoe-button spider. _Natural prey._--Cockroaches, Puerto Rico (Petrunkevitch, 1930). U.S.A., Florida, on shipboard (Anonymous, 1939): This is a presumptive host record, as the spiders were not reported as having been seen eating cockroaches; however, heavy infestations of both were found together. Family LYCOSIDAE =Lycosa helluo= Walckenaer _Experimental prey._--Young nymphs of _Diploptera punctata_, U.S.A. (Eisner, 1958): Larger nymphs and adults repelled the spider by ejecting a repellent secretion, which has been identified as a mixture of _p_-benzoquinone and its derivatives by Roth and Stay (1958). =Lycosa= sp. _Experimental prey._--_Supella supellectilium_, U.S.A. (Roth and Willis, unpublished data, 1953): The lycosid (pl. 30, B-E) was probably _L. avida_ Walckenaer (tentatively identified by Dr. B. J. Kaston from a photograph). Order ACARINA Family PHYTOSEIIDAE =Blattisocius tineivorus= (Oudemans) _Synonymy._--_Blattisocius triodons_ Keegan [Baker and Wharton, 1952].