The use of oil sprays has proved of value in grasshopper control operations on the open range lands of British Columbia under certain specific conditions.

Only when a species, such as Camnula pellucida (Scudder), which deposits it eggs in definite egg-beds which have heen definitely located and staked during the previous summer, or when nymphs or adults are concentrated in very large numbers in small depressions or, as in the case of Melanoplus mexicanus mexicanus (Saussure), on tall weeds, and when weather conditions are not favourable for poisoning, is the use of oil sprays justified as an adjunct to the regular poisoned bait campaign.

The preceding part under this general title was published in 1929 (Can. Ent., 61: 15—22).The novelties discussed at this time were included in collections sent to me by my friends, Professor J. Speed Rogers, of the University of Florida, and by Dr. Henry K. Townes, of Cornell University. Except where indicated to the contrary, the types of the new forms are in the collection of Professor Rogers, to be placed eventually in the Museum of Zoology of the University of Michigan. I wish to express my deep thanks to the collectors for the privilege of describing these species.

The remarkable nymphs of Baetisca rogersi were first found in the streams of northwest Florida in April, 1938. Several other nymphs were collected in June and November, but it was not until March of the following year that I was successful in securing adults. The nymphs are very hardy; those collected March 17 withstood an automobile trip of nearly three hundred miles and confinement in a small jar for almost three days with only a few casualties. In the laboratory at Gainesville, one male and two female imagoes were reared from the survivors.

A series of specimens of this genus from Churchill, Manitoba, includes males of piniphilus Esch., of heteronychus Fall, and of two species which are described below as new. I am unable to distinguish the females, all of which have each claw of each tarsus supplied with a broad basal tooth.

The opening of a new highway along the coast from Monterey to San Luis Obispo, California, made it possible to collect in a hitherto rather inaccessible region. In 1938 Dr. Michael Doudoroff of the Hopkins Marine Station, Pacific Grove, California, took near Monterey, a few badly worn specimens of an Incisalia which he believed to be new. Returning the ensuing year in June and following the highway south about thirty miles below Carmel, he stopped near Big Sur, Monterey County, and there, after rather strenuous collecting on the precipitous seaward slopes of the mountains, he succeeded in taking a small series (eleven males and two females) of these butterflies. These he very kindly sent to me for determination.