1. Boulenger, G. A., Proc. zool. Soc. Lond. (1886) 416.
2. Dunn, E. R., Proc. Am. Acad. Arts. Sci.58 (1923) 513.
3. Morescalchi, A., Odierna, G., and Olmo, E., Experientia35 (1979) 1434.
4. Ikebe, C., Yamamoto, T., and Kohno, S., Chromosome Information Service30 (1981) 17.
5. Kohno, S., Ohhashi, T., and Ikebe, C., Proc. Japan Acad.59B (1983) 271.