. Carnegie Institution of Washington publication. 14 THE VARIATION AND CORRELATIONS OF more than one from the same locality. Furthermore, no one species was represented by an extra large number of specimens. I have also embodied in my data the measurements given by de Saussure (1876-77) as typical of various species. There are about 30 of these. In this way data of the genus as a whole have been procured as nearly representa- tive as possible. 20. 579 a iJ 15 17 19 21 23 25 27 . 4.—Polygons of frequency for interspecific and intruspecific (Gotba, Florida) ovipositor lengths. By "intraspec
. Carnegie Institution of Washington publication. 14 THE VARIATION AND CORRELATIONS OF more than one from the same locality. Furthermore, no one species was represented by an extra large number of specimens. I have also embodied in my data the measurements given by de Saussure (1876-77) as typical of various species. There are about 30 of these. In this way data of the genus as a whole have been procured as nearly representa- tive as possible. 20. 579 a iJ 15 17 19 21 23 25 27 . 4.—Polygons of frequency for interspecific and intruspecific (Gotba, Florida) ovipositor lengths. By "intraspecific" here, the population of a single restricted area is meant. Since "species" is, in this material, such an indefinite term, "intraspecific" is not very fitting, but with the discussion of section 1 in mind its special meaning in this case will be readily understood. TABLE 8.—Comparison of intraspecific and interspecific variability. Average intra- specific coefficient of variability. Interspecific coeffi- cient of variability. Short- winged. Long- winged. Short- winged. Long- winged. Body Tegmina Posterior femora Ovipositor It is to be noted, in the first place, that the interspecific variation curves (table 79) are of the familiar error type. The mediocre species, like the mediocre individuals of a local collection, are the most common. The extremes are rare. Fig. 4 shows the polygon of ovipositor lengths for the long-winged group of the genus as a whole and also the one for that long-winged portion of the genus which was found at Gotha, Florida, September, 1903. It gives a graphic idea of the relation between the range of variation of a moderately variable local collection and of. 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 n
Size: 2254px × 1108px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1908
