Monteithiella humeralis is a species of insect belonging to the family Miridae, commonly known as plant bugs. It is found in various parts of North America. This insect is characterized by its small size, measuring around 4-5 mm in length, and its distinctive coloration, with a black body and yellowish-green markings on the wings. Monteithiella humeralis primarily feeds on the sap of various plants, making it a potential pest in agricultural settings.