Proceedings of the Washington Academy of Sciences (Volume 4)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...for variation in venation (see pp. 217 and 226), the variation in number of costal hooks in 299 left hind wings is graphically shown in the frequency polygon on the following page (fig. 24). The range is from 17 to 26, the mean 21.13, the mode 21 (with 22 almost as frequent), the standard deviation 1.581, and the coefficient of variation, 7.48. The variation in 293 right hind wings (7 individuals of the lot Fig. 24. Frequency polygon of the variation in number of costal hooks of the left hind wings of 299 worker honey bees taken from laboratory hive at one time; mean 21.13; index of variability 1.581; coefficient of variation 7.48. Fig. 25. Frequency polygon of the variation in number of costal hooks of the right hind wings of 293 worker honey bees taken from laboratory hive at one time; mean 21.4; index of variability 1.462; coefficient of variation 6.8. had torn wings) is graphically shown in the frequency polygon on p. 234 (fig. 25). The range is from 18 to 25, the mean 21.4, the mode 21 and 22 (these two numbers of the same frequency), the standard deviation 1.462 and the coefficient of variation 6.8. Fig. 27. Frequency polygon of the variation in number of costal hooks of the left hind wings of 48 drone honey bees taken from hive No. 10 at one time; mean 21.1; index of variability 2; coefficient of variation 9.53. tion in costal hooks of the left hind wings in these lots is as follows: Workers: Range 20 to 25, mean 22.1, mode 22, standard deviation 1.36, coefficient of variation 6.15 (see fig. 26). Drones: Range 17 to 26, mean 21.1, mode 22, standard deviation 2, coefficient of variation 9.53 (see fig. 27). Five lots of ten workers each, taken from five different hives and put together to form one mixed lot of 50 show the following variation in the hoo...