Probably similar to K. acuminata as follows: Body broadly oval, triangular, head narrowly rounded, posterior apex broadly rounded; flat in lateral view; body pale green or yellow green; without an obvious wax covering; ovisac absent. Occurring on leaves.
Kilifia americana is similar to both K. acuminata and K. deltoides by having hind 2 pairs of legs conspicuously larger than front legs; hind 2 pairs of coxae with unusual cavity laterodistally; anal plates with anterolateral margin longer than posterolateral margin; anal plates in middle of abdomen; without tubular ducts. Kilifia americana differs by having anterolateral margin of anal plate more than 2 times as long as posterolateral margin (smaller than 2 times in K. acuminata and K. deltoides).
U.S. quarantine notes
This species was intercepted 17 times at U. S. ports-of-entry between 1995 and 2012, with specimens originating from Costa Rica, Mexico, and Puerto Rico. We also have examined specimens taken in quarantine from Costa Rica (Citrus); Honduras (Citrus); Mexico (Chamaedorea, Citrus, Coffea, Ervatamia, Gardenia); Panama (Citrus). ScaleNet includes hosts in 7 plant families from the Nearctic zoogeographic region only, although we now know that it occurs in the Neotropical region also. It is commonly intercepted on Citrus. No other species of Kilifia other than K. acuminata (Signoret), K. americana and K. deltoides De Lotto have been taken at a U. S. port-of-entry.