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Dancing, universality of. Danger-signals of animals. Daniell, Dr., his experience of residence in West Africa. Darfur, protuberances artificially produced by natives of. Darwin, F., on the stridulation of Dermestes murinus. Dasychira pudibunda, sexual difference of colour in. Davis, A.H., on the pugnacity of the male stag-beetle.
For instance, I observe in my son's cabinet that the males are darker than the females in the Lasiocampa quercus, Odonestis potatoria, Hypogymna dispar, Dasychira pudibunda, and Cycnia mendica. In this latter species the difference in colour between the two sexes is strongly marked; and Mr.
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