Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 FIG. 223. Wing of a Hepialid moth, showing plan of vena- . tion. (After Comstock.) FIG. 222. Wings of a Noto- dontid, showing venation. .F, frenulum. (After Comstock.) these veins, where branches exist, are numbered III^ IIL, III3, etc. The system considers I (the front margin of wing) simple, II simple, III possessing five branches, IV with three branches, and V with two branches. Those main veins which come after V are called anal veins. They are generally simple. This ar- rangement ha
Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 FIG. 223. Wing of a Hepialid moth, showing plan of vena- . tion. (After Comstock.) FIG. 222. Wings of a Noto- dontid, showing venation. .F, frenulum. (After Comstock.) these veins, where branches exist, are numbered III^ IIL, III3, etc. The system considers I (the front margin of wing) simple, II simple, III possessing five branches, IV with three branches, and V with two branches. Those main veins which come after V are called anal veins. They are generally simple. This ar- rangement has reference to the early or primitive plan of the wing. This condition is shown in Figure 222. This arrangement is greatly modified in some of the higher types, by the elimination of branches or even trunks and by the coalescence of veins for part or for their entire length. AA.—Antennae of various forms, frequently feather-like, rarely knobbed at tip, but in such cases the hind wing bears a frenulum.
Size: 1498px × 1335px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
