This species was intercepted at U. S. ports-of-entry 19 times between 1995 and 2012, with specimens originating from Bangladesh, India, The United Arab Emirates and Vietnam. We also have examined specimens taken in quarantine from India (Mangifera); Iran (Annona); Pakistan (Annona, Mangifera). ScaleNet lists hosts in 16 plant families. It is most commonly intercepted on mango. ScaleNet distribution records for F. robustus include Bangladesh, India and Pakistan in the Oriental region, and Iran in the Palaearctic region. Three species of Formicococcus besides F. njalensis, F. polysperes Williams and F. robustus (Ezzat & McConnell) have been taken at U. S. ports-of-entry including: F. acerneus Williams (India, on Mangifera); F. erythrinae Williams (India, on Mangifera); and F. mangiferacola Williams (India, on mango).