Subject: cant identify
Location: calabasas, california
September 15, 2013 8:51 am
Hi and thanks for looking at this unusual bug that has been living on my cactus.
they dont seem to be bothering the plant but they have multiplied.
After a bit of searching, we are confident that we have identified your immature Leaf Footed Bugs as being in the genus Narnia. Our first clue came from the Sonoran Desert Naturalist website where we found images of a pair of adult mating Narnia species. According to the site: “Like all true bugs Narnia feed by inserting a thin, tubular proboscis through the plant cuticle and into more nutritious tissues below. The preferred target for feeding is developing seeds that are rich in proteins. Through the straw-proboscis the bugs can take in only liquid food – if the point reached by the piercing proboscis is dry the bug will inject some digesting saliva first and then reimbibe the partly digested material. In so doing they damage or kill the developing seeds and may introduce fungi or other rot-causing pathogens. Damaged seeds may appear dark or shriveled and have lower germination success.” Since the Sonoran Desert Naturalist site only provided a photo of an adult, we found a photo of a nymph on BugGuide that matches your specimens. According to BugGuide: “nymphs and adults feed on fruit and joints of prickly pear cactus (Platyopuntia and Cylindropuntia spp.)”