. How to know the butterflies; a manual of the butterflies of the eastern United States. Butterflies. GENERAL ACCOUNT OF BUTTERFLIES which this type has been modified in the Lepi- doptera. Taking the hypothetical type (Fig. 5) as an illustration, we see that the veins of the wings can be grouped under two heads : first, longitudi- nal veins, those that normally extend lengthwise of the wing ; and second, cross-veins, those that. 3d A 2d A Fig. 5.—Hypothetical venation of the primitive winged insect extend transversely from one longitudinal vein to another. The names that have been applied to t
. How to know the butterflies; a manual of the butterflies of the eastern United States. Butterflies. GENERAL ACCOUNT OF BUTTERFLIES which this type has been modified in the Lepi- doptera. Taking the hypothetical type (Fig. 5) as an illustration, we see that the veins of the wings can be grouped under two heads : first, longitudi- nal veins, those that normally extend lengthwise of the wing ; and second, cross-veins, those that. 3d A 2d A Fig. 5.—Hypothetical venation of the primitive winged insect extend transversely from one longitudinal vein to another. The names that have been applied to the longi- tudinal veins, beginning with the one nearest the costal margin of the wing, are casta, subcosta, ra- dius, media, cubitus, first anal, second anal, and third anal. In descriptions these veins are often designated, as they are in Figure 5, by the follow- ing abbreviations of these names: C, Sc, R, M, Cu, 1st A, 2d A, and 3d A. Beginning with subcosta, the four veins that 9. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. New York, D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbutterf, bookyear1904