A recent study of that complex of the genus Diarsia which at present is found in collections under the name rosaria Grt. has convinced me that at least two species, easily separable on the basis of maculation and colouring, have gone under this name. One of these, the true rosaria, is confined to the more northerly portions of the California coast. The other species ranges from Alaska south through British Columbia into the Pacific Northwest of the United States, and from the coast of British Columbia east through the northern coniferous forest zone to the coast of Labrador. The latter species is divisible on the basis of well defined genitalic differences into a subspecies inhabiting the Cordilleran region and a subspecies confined to the northern coniferous forest.

The jack-pine budworm, Ohoristoneura sp., was first recorded by Graham (5, 6) as a new variety or race on jack pine. Subsequent studies by Graham (6 showed that in the early stages of their development the larvae of this insect prefer jack-pine staminate flowers as a habitat. Population records from Manitoba and northwestern Ontario indicate that infestations of the jack-pine budworm are invariably associated with an abundance of staminate flowers.

In British Columbia parathion was first officially recommended to the fruit grower in 1949 for the control of orchard insects and mites, particularly the pear psylla, Psylla pyricola Foerst.; the European red mite, Metatetranychus ulmi (Koch)=[Paratetranychus pilosus (C. & F.)]; and the Pacific mite, Tetranychus pacificus McG. Similar recommendations were made simultaneously in other Canadian fruit-growing areas. In British Columbia the Okanagan Spray Committee advised the use of only one formulation and one concentration: 15 per cent wettable powder at 0.75 pounds per 100 imperial gallons. At the start of the season most growers were rather reluctant to use parathion, not necessarily because it was new but because the poisonous nature of the material had been so thoroughly impressed upon them. However, as the season progressed and orchard pests became generally more troublesome, their attitude changed, so that by mid-season the use of parathion was common. It is estimated that at least 75 per cent of Okanagan Valley fruit growers used this insecticide at one time or another during the season. They bought from 40 to 50 tons of 15 per cent parathion wettable powder in 1949.

For a number of years, at least one species of Dytiscus, apparently undescribed, has been in my collection.

Recently Professor M. H. Hatch asked me to describe this species in order that he might include it in his forthcoming book on The Coleoptera of the Pacific Northwest.

Although Balfour-Browne, 1935, pointed out that the correct spelling of the generic name is Dyticus, this does not seem to have been accepted, as in the 5th Supplement to the Leng Catalogue, Dytiscus is still used. I, therefore, use that spelling.

During recent field studies of the behaviour and activiw of larvae in colonies of M. americanum and H. textor, it was noticed that nymphs and adults of Podisus placidus (Uhler) and of P. modestus (Dallas) frequently visited colonies of the eastern tent caterpillar and occasionally those of the spotless fall webworm. Although small larvae, particularly those of the tent caterpillar, fell prey to both nymphs and adults, larvae of the fifth and sixth instars occasionally exhibited special reactions.