It is now more than twenty years since H. S. Barber recorded and described a most peculiar insect larva that had been taken from beneath the dead leaves of tree Yucca at Hesperia, on the Mojave Desert in San Bernardino County, California. It may be recalled that specimens of this larva were taken to Washington, where one of them remained alive without taking food for a period of twenty six months. The species was once more recorded by Couden who reported finding a single specimen in old alcoholic material that had been received from D. W. Coquillett at San Bernardino in 1892.

The half-tone illustrations of the butterfly transition forms, herein described, vary somewhat in size from the actual specimens; therefore, a reference to their wing expanse, as given in the text is advisable. The classification of these specimens follows that outlined in the November, 1927, Entom. News (Philadephia) and which was first suggested in that publication.

Maxillary lobes membranous. Mandible with molar corneous, lacinia membranous.

Head wide, strongly deflexed. Front not tuberculate or carinate. Eyes hidden in repose. Clypeus apparently broadly emarginate when viewed from above; in reality not emarginate, the apex being bent ventrad and caudad, this inflexed portion short and limited above by a fine carina.

Descriptions of several new species of two-winged flies from North America are presented herewith and keys to several genera or well-defined groups are given. I am indebted to Dr. J. M. Aldrich of the United States National Museum for comparing considerable Tachinid material with the types in collectiocs under his care and also for additional representatives of some of the new species.

I am indebted to the Rev. Robert Connell for some very interesting Coleopterous remains in black lignite from the south end of Cordova Bay, Victoria. The deposit is overlain by about 180 feet of clay, sand, and gravel, the Cordova sands and gravels and Maywood clays constituting the Puyallup interglacial deposits, with Vashon drift above. Of the Puyallup deposits the Maywood clays are the older, and in them is the lignite bed with marine shells in the overlying clay and finely stratified whitish clay underlying it. The lignite contains pieces of wood, seeds, and other plant remains.