Soc.

Trans." XXV.: a paper on the geographical distribution and variability of the Malayan Papilionidae.) It is admirably done.

I cannot conceive that the most firm believer in species could read it without being staggered.

Such papers will make many more converts among naturalists than long-winded books such as I shall write if I have strength.

I have been particularly struck with your remarks on dimorphism; but I cannot quite understand one point (page 22), (189/3.