The predaceous katydid species Arachnoscelis meriti, n. sp. (Listroscelidinae) and Phlugiola arborea, n. sp. (Meconematinae) are described herein. Keys to species of both genera based on morphological differences are also provided. Both species were collected from rainforest canopies in northern Peru. Based on the numbers of additional new forms collected, sorted and identified during the course of this study, many species in addition to these are new to science, providing evidence of a very rich and diverse arboreal fauna in northern Peru. After reviewing literature on the tribe Phlugidini, Tenuiphlugis Kevan (with 4 species) is herein synonymized with the genus Lucienola Gurney.