NSF 2013 Project – Educational Materials Poster: Differences in sNPF receptor-expressing neurons in brains of fire ant (Solenopsis invicta Buren) worker subcastes: indicators for division of labor and nutritional status? Short neuropeptide âFâ and the nutritional and reproductive status of the red imported fire ant colony- Departmental Seminar Fall 2014- Prati Bajracharya Red Imported Fire Ant Reproductive Larvae Characteristics Red Imported Fire Ant Reproductive Pupae Characteristics Photography Abstract: Short neuropeptide F receptor localization in the brain of fire ants worker subcastes: a possible role in mechanisms of division of labor and nutritional status