Lascari studied at the National Academy School, first in the antique class (1902-04) and then in the life class (1906-07, 1909-10, 1911) with Francis C. Jones and George de Forest Brush. He won the Prix de Rome and spent three years at the American Academy before travelleing through England, France, Spain and North Africa (1913-14). After his return to the United States he married, in 1916, Hilda Kristina Gustafson, a sculptor and later an associate member of the National Academy. The couple returned to Europe and travelled to Italy, France, Germany, Sweden, Norway, Turkey, and Greece from 1919 to 1927.
Lascari's commissions include glass mosaics for the loggia of the Currier Gallery of Art, Manchester, New Hampshire (1931); marble floor masaics and painted ceiling decorations for the William Welch Medical Library of Johns Hopkins Medical School, Baltimore, Maryland; and mural decorations for the Washington Irving High School in New York City.
Lascari was an instructor at the National Academy from 1931 to 1941. Often, he included examples of his wife's sculptures in his paintings. An exhibition of his work was held at Fairleigh Dickinson University, Rutherford, New Jersey in 1947.
