Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 Fig. 249. Scales on wing of butterfly. Head of a moth. — The tongue uncoiled at a; seen from side, partly coiled, at b ; the appearance of tongue under a lens at c. times a difference even in the sexes, certain kinds of highly developed scales occurring on the wings of the male only, usually confined to limited areas and sometimes concealed by folds. In this order the adult insects are harmless throughou
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 Fig. 249. Scales on wing of butterfly. Head of a moth. — The tongue uncoiled at a; seen from side, partly coiled, at b ; the appearance of tongue under a lens at c. times a difference even in the sexes, certain kinds of highly developed scales occurring on the wings of the male only, usually confined to limited areas and sometimes concealed by folds. In this order the adult insects are harmless throughout, capable of feeding only upon liquid food by means of a tongue which is usually coiled like a watch-spring on the under side of the head between the palpi. In some instances it is wanting, and on the other hand sometimes becomes enormously developed, reaching a length in some species of from five to nearly seven
Size: 1351px × 1480px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
