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In Geotrupes stercorarius the rasp appeared to me thicker, opaquer, and more prominent in three males than in the same number of females; in order, therefore, to discover whether the sexes differed in their power of stridulating, my son, Mr.

The posterior limbs of the Geotrupes stercorarius, "perfectly developed in the adult, are atrophied in the larvae, reduced to mere specks."

There is one small family the Skuas entirely unrepresented in my list; I am rather surprised at this as some of them, especially the Pomatorhine or, as it is perhaps better known, the Pomerine Skua, Stercorarius pomatorhinus, and Richardson's Skua, Stercorarius crepidatus, are by no means uncommon on the other side of the Channel, about Torbay, during the autumnal migration; but I have never seen either species in the Island, nor have I seen a Channel Island skin, nor can I find that either the bird-stuffers or the fishermen and the various shooters know anything about them.

Here he was no longer a wonderful phantom spirit of the storm, but just a bird that might have been passed over at first glance as simply a seagull. But not at a second glance. Men called this strange bird Richardson's skua, or Arctic skua, or lesser skua, or, officially, Stercorarius crepidatus, or, most unofficially, in the vernacular, "boatswain," or "man-o'-war," or "gull-tormentor."

Professor Ansted has only mentioned one of the family the Great Skua, Stercorarius catarrhactes, in his list, which also may occasionally occur, as may Buffon's Skua, Stercorarius parasiticus; but neither of these seem to me so likely to occur as the two first-mentioned, not being by any means so common on the English side of the Channel.