. The Cambridge natural history. Zoology. 3i8 LEPIDOPTERA CHAP. commence hj remarking tha,t no system satisfactory from a practical as well as from a theoretical point of view has yet been devised. The diagrams given in figure 161 will enable us to explain the methods actually in vogue ; I. representing the system, dating from the time of Herrich-Schaeffer, chiefly used by British naturalists, and II. that adopted by Staudinger and Schatz in their recent great work on tlie Butterflies of the world. The three anterior nervures in both front and hind wings correspond fairly well, and are called,
. The Cambridge natural history. Zoology. 3i8 LEPIDOPTERA CHAP. commence hj remarking tha,t no system satisfactory from a practical as well as from a theoretical point of view has yet been devised. The diagrams given in figure 161 will enable us to explain the methods actually in vogue ; I. representing the system, dating from the time of Herrich-Schaeffer, chiefly used by British naturalists, and II. that adopted by Staudinger and Schatz in their recent great work on tlie Butterflies of the world. The three anterior nervures in both front and hind wings correspond fairly well, and are called, looking at them where they commence at the base of the wing, " costal," " subcostal," and. M' M2 Fig. 161.—Wiug-nervuratioii of Lepidoptera. I, Diagriim of moths' wings (after Hamp- son) ; II, of a butterfly's wings [Morpho vienelaus 3, after Stanilinger and Schatz). A, front, B, hind wing. I.—c, costal ; sc, subcostal ; vi^ median ; Irt, lb, Ic, in- ternal nervures ; /, frenulum ; 2, 3, 4, branches of median nervure ; 5, lower radial; 6, upper radial; 7-11, divisions of the siibcostal ; 12, termination of costal; c, cell ; d, discocellular nervure. II.—C, costal ; SC, subcostal ; M, median ; SM and SN, submediau nervures ; lA, inner-margin nervure ; UR, lower radial ; OR, up]ier radial ; SC^ to SC'^, divisions of subcostal ; M^ to M"', divisions of median nervure ; C, cell ; DC, discocellulars. " median " nervures. The nervures near the inner margin of the wing (that is the lower part in our figures) differ much in the front and hind wings, consisting either of two or of three separate portions not joined even at the base. British entomologists call these " branches or divisions of the internal nervure": the Germans call the more anterior of them the " submedian," and tlie more internal the "inner-margin nervure"; they are also frequently called anal nervures. The cross-nervure that closes the cell is call
Size: 2055px × 1216px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
