The image is a black and white illustration of a butterfly's tongue, depicted as a tightly coiled spiral. The tongue appears as a dark, tubular structure, tightly wound into a circular shape. The coils are closely packed, creating a dense, central core. The end of the tongue extends outward, appearing as a straight, slender tube. The illustration is labeled 'FIG. 19. BUTTERFLY'S TONGUE.' and 'x 50.' indicating a magnification of 50x. The background is a pale, off-white color, providing contrast to the dark tongue. The style of the illustration suggests it is a scientific or anatomical drawing, likely from an older publication.