During investigations on the natural enemies of root maggots attacking Cruciferae, the beetle Baryodma ontarionis Casey was reared from puparia of the cabbage maggot, Hylemya brassicae (Bouché). This was not unexpected, for Gibson and Treherne (1916) had reported a similar occurrence; the staphylinid beetles reared at that time were identified by Casey (1916), who decided that they belonged to the verna group of Baryodma and assigned the name Baryodma ontarionis. Casey (loc. cit.) considered the species rather common and stated that it did not seem to resemble any European species; but Mr. W. J. Brown (in litt.), Systematic Entomology, Division of Entomology, Ottawa, who identified the beetles collected in 1950, is of the opinion that B. ontarionis is synonymous with Aleochara bilineata Gyll., tvhich attaclrs the cabbage maggot in Europe. Wadsworth (1915) dealt with the biology of A. bilineata, giving detailed descriptions of the immature stages. A study of the biology of B. ontarionis was carried out at the Belleville laboratory as part of n program of parasite introduction with the purpose in view of using the information to evaluate the beetle as a factor in the control of root maggots that are severe pests of cabbage, cauliflower, turnip, and radish.

A bacterium, Bacillus cereus F. and F., which was isolated from diseased larvae of the codling moth, Carpocapsa pomonella (L.), is pathogenic to the codling moth in laboratory experiments (Stephens, 1952).

A series of trials was set up at Kentville to test the effectiveness of this bacterium against codling moth larvae in the field. B. cereus spores were propagated according to the method of Reed and McKercher (1948) and shipped to the field as spore suspensions.

Most grasshoppers of the prairie region of Western Canada hatch in the spring and complete their life-cycles in one year. There are a few species, however, that hatch in the fall and overwinter as partly grown nymphs; these include the oedipodines Arphia conspersa Scudd., Pardalophora apiculata (Harr.), Xanthippus corallipes latefasciatus Scudd., and Cbortophaga viridifasciata (Deg.) and the acridine Psoloessa delicatula delicatula (Scudd.). Criddle (1933) suggested this when he stated that, although the eggs of some Oedipodinae that hibernate as nymphs normally hatch within a month or two after oviposition, they occasionally fail to do so, in which case a further period of 12 months may occur before hatching takes place. The life-historia of all thest except C. viridifasciata were studied.

Methods for preserving biological material in transparent plastics were first published some 15 years ago (Hibben, 1937), and have now come into quite wide use. Accounts have heen published of several suitable techniques, mostly rather similar, in both the scientific (Knight, 1937; Puckett, 1940, 1941; Raizenne, 1949) and the commercial literature (Sheehan & Stewart, 1947; General Biological Supply House. 1950; Ward's, 1947). Although these materials are peculiarly suitable for the preservation of insect material, only one short mimeographed publication (Silver, 1948), has appeared describing a method specifically designed for use with an insect group. This method is essentially similar to the procedures described for soft tissues, all of which are much more elaborate than is necessary for insect material. Sheehan and Stewart (1947) mention that dried insect material may be immersed directly in the plastic monomer in the process which they describe.

The Tortricid Archips cerasivorana, described in 1856 by Fitch and usually known by the rather cumbersome name of the Cherry-Tree Ugly Nest Tortricid, is a well known insect, widely distributed in the United States and Canada. Its life-history and habits are described in many of the standard textbooks. The account given is usually rather vague but a more complete and satisfactory treatment is to be found in a paper published by A. B. Baird in 1918. The insect hibernates in the egg stage. The eggs hatch in the latter part of May and during early June. The larvae construct a web which they gradually extend over the foliage on which they feed. In the web they construct silk lined cells in which they live individually when not at work. They are full grown by about the middle of July or later. Their principal food plant is the choke-cherry but occasionally they attack the cultivated cherry.

The tuber flea beetle, Epitrix tubrnis Gent., has been a pest of potatoes in the Fraser Valley and the lower mainland of British Columbia since 1940 (Glendenning, 1942); However, it was first reported from the interior in 1944, at Keremeos and Princeton and in the southern Okanagan Valley (Buckell, 1944). In 1945 and 1946, the first surveys were made to determine the area involved. The area and the degree of infestation have since increased anti1 it is now a very serious pest in the interior. The area of infestation is bounded by the International Border on the south and the Okanagan Valley on the east and extends northward to Malakwa. From here the line runs west through Adam's Lake to Barriere, to Criss Creek, to Pavillion, thence south to Lillooet, Lytton, Merritt, Princeton, and Hedley.

Lord (1949) listed the predators of the European red mite, Metatetranychus ulmi (Koch.), in Nova Scotia and described the effects of a number of chemicals on them. Among the more important predators is the thrips Haplothrips faurei Hood. This thrips, however, does not confine its feeding to European red mite eggs but readily attacks the eggs of many other mites and insects. There is strong evidence that it is one of the most important biotic factors in the natural control of insect and mite pests in Nova Scotia apple orchards. It and another species, Leptothrips mali (Fitch), are the only thrips of economic significance, and H. faurei, because of its greater numbers, is the more important. A description of the life-history of L. mali was given by Bailey (1940), who also (1939) studied the biology of another thrips, Scolothrips sexmaculatus (Perg.), which is of minor importance in Nova Scotia. The only other predacious thrips found is a species bclieved to be Zygothrips minutus Uzel, which occurs only rarely and in small numbers. Haplothrips subtilissimus Hal. (later identified as H. faurei), was found by Putman (1942) in Ontario to be predacious on phytophagons mites and the eggs of oriental fruit moth, Grapholitha molesta Busck.