The use of gelatin as a medium in which to mount and permanently preserve biological specimens is by no means new; it was advocated by Lee at least fifty years ago. It is only within the last ten years, however, that its usefulness as a practical method for preserving entomological material has been realized. Its application to insect work was first suggested by Prof. L. J. Muchmore of the Southwest Museum, Los Angeles. California, to H. C. Lewis, who reported on the subsequent development of the technique in 1929.

Similar in wing shape and in the possession of a double areole on primaries to Euacidalia Pack. Palpi short; male antennae finely ciliate. In the male hind-legs the tibiae are very broad and long (twice the length of the tibiae in Euacidalia), rather flattened with strong hair pencil, without spurs and projecting apically over the first joint of the tarsi. Tarsi extremely short and attached to the ventral surface of the tibiae.

In spite of Mr. H. C. Fall's paper on Ilybius in the “Entomological News”, XXXVIII, 1927, much confusion as to the correct identification of species in that genus is still apparent. Nor is this to be wondered at. One species frequently superficially resembles another so closely that only careful discrimination will make certain what is in hand. Further, to my knowledge, no key by which females can be determined has been devised. This latter deficiency I have endeavoured to remedy.

I spent December to April 1937—'38 at St. John, Virgin Island, W. I., and the same period 1938—'9 at Tahiti, French Oceania. The following paper records the species taken, with some notes as to habits and brief descriptions as to the colour pattern of the live insects. This I hope is justified, for too often the original description is of specimens long dead, when the body colour has faded and that of the eyes completely changed.

Within the past few years an increase both in abundance and distribution of the Mormon cricket has occurred in Saskatchewan. This was especially conspicuous in 1938.