20 JULY 1934, Page 15

Migrating Butterflies

The extraordinary discovery last year in England of over thirty Milkweed butterflies that had emigrated from America will draw attention to the list of immigrants that the South Eastern Union of Scientific Societies has put together " for recording in 1934." It may be useful to give the list of those that are wholly immigrant (or so it is supposed) : the Painted Lady, Red Admiral, Clouded Yellow, Pale Clouded Yellow, Death's Head and Convolvulus Hawk Moths, Hum- ming Bird Hawk Moth, Silver Y Moth, Rush Veneer. The special insect immigration committee are desirous of all information on any of these, which they put in a class by themselves. They would disappear from Britain if there were no immigration.

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