Journal of Genetics

, 7:135 | Cite as

Studies in inheritance in the hybridPhilosamia (Attacus) ricini (Boisd) ♂ × Philosamia cynthia (Drury) ♀

  • Onera A. Merritt Hawkes


  1. 1.

    The plain or non-spotted condition of the larva ofP. ricini is recessive to the spotted condition of the larva ofP. cynthia (Ning-po variety).

  2. 2.

    The dominance in the F1 generation is incomplete; all the larvae are spotted but not all have the full complement of spots.

  3. 3.

    The spots are probably represented, not by one, but by a group of related gens in the chromosome.

  4. 4.

    The dominant homozygous and the heterozygous forms can be distinguished only by breeding, as both may be either full- or partly-spotted.

  5. 5.

    A number of abnormal larvae with reduced tubercles occurred in the F2 generation; when mated with normal larvae, this character behaved as a recessive; whether it was a mutation which occurredde novo as a result of this particular cross or whether it is a result always to be expected from this hybrid, has not yet been determined. This non-tubercled mutation (?) is interesting in relation to the few non-tubercled species among the Saturniids.



Black Spot Natural Size Smooth Form Heterozygous Form Plate VIII 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. (1).
    Berlese, A. Gli Insetti, Vol. i. p. 477, fig. 529, 1909.Google Scholar
  2. (2).
    Crampton, H. E. “Experimental and Statistical studies upon Lepidoptera. I. Variation and elimination in Plnlosamia cynthia.”Biometrika, iii. pp. 113–130. “II. Variation and Selection in Saturnid Lepidoptera. Philosamia cynthia.”Biol. Bull. vi. pp. 310, 311.Google Scholar
  3. (3).
    Fracker, Stanley Black. “The Classification of Lepidopterous Larvae.”Illinois Biological Monographs, No. i. Vol. ii. July 1915. Published at Urbana, Ill.Google Scholar
  4. (4).
    Frings. “Saturnia Hybrids (Zurich). Casparii.”M. Soc. Entomol. Zurich, Vol. xxi. pp. 25–27, 1906.Google Scholar
  5. (5).
    Hawkes, O. A. Merritt. “The Effect of Moisture upon the Silk of the Hybrid, Plnlosamia (Attacus) ricini (Boisd.) ♂ × Philosamia cynthia (Drury) ♀.Journ. Exp. Zoo. Vol. xxi. No. I. July 1916, pp. 51–60.CrossRefGoogle Scholar
  6. (6).
    Joutel, L. H. “Philosamia cynthia × Callosamia promethea crosses,” pp. 101–103.Journ. New York Ent. Soc. Vol. xv. 1907.Google Scholar
  7. (7).
    Kellogg, Vernon L. Inheritance in Silkworms. I. Stanford University, California, 1908.Google Scholar
  8. (8).
    Lefroy, Maxwell H., andGhosh, C. C. “Memoirs of the Department of Agriculture in India.”Eri Silk Entomological Series, Vol. iv, No. 1, May 1912.Google Scholar
  9. (9A).
    Packard, A. S. “Monograph of the Bombyeinc Moths of North America.” Part iii. First Memoir of Vol. xii. of theMemoirs of the National Academy of Sciences, Washington, 1914.Google Scholar
  10. (9B).
    Ditto, Part I. issued as Vol. vii. in 1895 contains “Hints on the Evolution of the Bristles, Spines and Tubercles of Notodotian and other Caterpillars,” p. 11, which is reprinted with some alterations from an article in theProc. Boston Society of Nat. History, Vol. xxiv. 1890, pp. 482–515, 556–559.Google Scholar
  11. (10A).
    Soule, C. G. “Some experiments on Hybrids.”Psyche, Boston, Vol. ix. pp. 411–413. 1902.CrossRefGoogle Scholar
  12. (10B).
    Ditto.Psyche, Vol. xiv. pp. 116, 117. 1907.Google Scholar
  13. (11).
    Tanaka, Yoskimaro. “Genetic Studies in the Silkworm.”Journal of the College of Agriculture. Tohoku Imperial University, Sapporo, Japan, June 1916. In this is found complete references to all the Japanese work on Silkworms.Google Scholar
  14. (12).
    -,A general Report of Sericultural Investigation. The Imperial Sericultural Institute at Tokyo, 1910.Google Scholar
  15. (13).
    Watson, J. W. “New Saturnidæ.”Transactions and Annual Report of the Manchester Entomological Society, 1913. Plate I.Google Scholar

Copyright information

© Indian Academy of Sciences 1918

Authors and Affiliations

  • Onera A. Merritt Hawkes

There are no affiliations available

Personalised recommendations