Laetilia portoricensis is a species of snout moth in the genus Laetilia. It was described by Dyar in 1915. It is found in Puerto Rico. Adults are generally brownish, but the costal margin of the forewing is light grey. The larvae have been recorded feeding on unidentified scale insects on Cajanus cajan and the scale insect Saissetia oleae on Spathodea campanulata. They have also been reared on withering stems of Chromolaena odorata.