Class ARACHNIDA
In this class, representatives of at least four orders have utilized cockroaches as food: the whip scorpions, scorpions, spiders, and mites. Apparently none of these feed exclusively on cockroaches, but the Philippine forest scorpion Heterometrus (=Palamnaeus) longemanus seems to prefer blattids to other insects (Schultze, 1927).
Order PEDIPALPIDA
Family THELYPHONIDAE
Mastigoproctus giganteus (Lucas)
Synonymy.—Thelyphonus giganteus Lucas [Dr. R. E. Crabill, personal communication, 1958].
Experimental prey.—Cockroaches, U.S.A. (Marx, 1892, 1894): Immature whip scorpion captured and fed on one or two cockroaches a week. It lived on this diet for about two years.
Mastigoproctus sp.
Common name.—Whip scorpion.