Early in the present century the balsam woolly aphid, Adelges piceae (Ratz.), was introduced accidentally into North America. The history of its development and spread in the United States and Canada has been described by Balch (1952). At the present time, the adelgid occurs in eastern Canada over approximately the southern half of New Brunswick with an extension of the range in the extreme northeastern part of the Province, throughout Nova Scotia and Prince Edward Island, and in some areas of the southwestern and southeastern parts of Newfoundland.

In July, 1956, a pupa of the imported cabbageworm, Pieris rapae (L.), was found attached to the undersurface of a corn leaf in experimental plots at St. Jean. After the pupa had been incubated at 75°F. for six months, a dipterous parasitic larva emerged and pupated immediately; a tachinid fly emerged two weeks later. The parasite was identified by Mr. J. G. T. Chillcott, Entomology Division, Ottawa, as Phryxe vulgaris (Fall.). P. vulgaris has been reported as a parasite of Pieris rapae, P. brassicae (L.), P. napi (L.), and Vanessa urticae (L.) from many central and northern European countries (Thompson, 1946, pp. 467-469; 1947, p. 598). Aldrich and Webber (1924), Chittenden (1926), and Schaffner and Griswold (1934) reported this parasite from P. rapae in the United States. P. vulgaris has been reported from Canada only on larvae of the armyworm, Pseudaletia unipuncta (Haw.), in Nova Scotia and New Brunswick (Gibson, 1915, p. 14).

Generally throughout eastern Canada, wood borers of the genus Monochamus present the greatest single theat to softwood logs that must remain in the woods thrnughoat the summer and to standing trees killed as a result of fire or other disturbance. Althoush a considerable body of literature has been accumulated on the general biology and taxonomy of rlie econonucally important species (4, 5, 11, 15), on the ainount of damage caused by them under particular circumstances (2, 12), and on the protection of logs from damage (1, 3, 10, 13, 14), comparatively little detail is available on their seasonal development.

The diamondback moth, Plutella maculipennis (Curt.), is one of three species of Lepidoptera that annually cause serious commercial damage to cabbage and related crops in Ontario. It has long been underrated as a pest of cruciferous crops, possibly because of its small size; in eastern Ontario, it is much more numerous than the other two species and ranks second in importance to the imported cabbageworm, Pieris rapae (L.) (Harcourt et al., 1955). Its biology in eastern Ontario was investigated from 1951 to 1956. The history, distribution, and synonomy of the insect and general descriptions of the stages were given earlier (Harcourt, 1956). This article presents the life-history, behaviour, and host relationships.

In the description of the Byron Bog (Judd, 1957) it was pointed out that the Pitcher-plant, Sarracenia purpurea L., is a plant commonly associated with leather-leaf, Chamaedaphne calyculata, in the “Chamaedaphnetum calyculatae” association in the bog. The period of blooming of this plant in 1956 was from June 13 to June 22. During this period, and subsequently, collections were made of larvae of the moth Exyra rolandiana Grt. from the flowers and leaves. The moths were kindly identified by Mr. D. F. Hardwick, Systematic Entomology, Department of Agriculture, Ottawa.

In a series of papers it has been shown that Tityus chromosomes are provided with one centromere at each end (2, 4, 5 and 6). Proofs of such a view were found in the behaviour of the chromosomes in the course of spermatogenesis in the widely distributed Brasilian species T. bahiensis (Perty). Indeed, the long rod-shaped bivalents of this interesting species orient themselves in such a way that, while their bodies lie flat in the equatorial plane, the partners' corresponding ends are turned towards opposite poles. Metaphase side views show that the paired chromosomes are separated throughout their length. Being entirely unconnected by chiasmata, the chromosomes move toward the poles in perfect parallel, with the ends forward until late anaphase, when they bend strongly. Fragments bearing a single terminal centromere perform anaphase movement parallel to the spindle axis, as do the orthodox acrocentric rod-shaped chromosomes (11).

During the investigation of mealybug parasites in Trinidad seven species of Aenasius, one of them new, and a new species of Zarhopalus have been reared. The new species are described herein.

Genus Aenasius

Compere, (Proc. Hawaii. ent. Soc., 9, pp. 383-404, 1937) gave a comprehensive review of the genus, described several new species and provided a key for the separation of the known species. Recently three additional species have been described, Aenasius masii, by Domenichini (Boll. 2001. agrar. bachic., 17, 157-180, 1951) from Peru, Aenasius theobromae by Kerrich (Bull. ent. Res., 44, 789-810, 1953) from Trinidad, and Aenasius bolowi by Mercet (Rev. Acad., Madrid, 41, 461-468, 1947) from Costa Rica.

Food habits and occurrence of the commoner species of coccinellids in peach orchards of the Niagara Peninsula, Ontario, are being investigated in connection with a study of the effects of pesticides on biological control agencies. Results of a study of Stethorus punctillum Weise have already been published (Putman, 1955). The present account deals with laboratory tests of feeding, mostly during June and July from 1952 to 1955, with prey of special economic importance in peach orchards.

In July, 1952, during studies on the Colorado potato beetle, Leptinotarsa decemlineata (Say), at Merivale, Ontario, a large-scale dispersal of the larvae was observed. A field of early potatoes consisting of seven 100-foot rows, which was to be used as a source of supply of the insect for plant resistance studies, had been artifically infested on June 30 by placing an overwintered adult on each plant. The beetles laid eggs in largc numbers and by the second week of July the plants were overpopulated wit11 larvae. By July 14 the plants were stripped of foliage and the larvae were forced to feed on the stalks. On the morning of July 16 the starving larvae began to leave the plants in large numbers. Almost all left on the one day, some of them travelling considerable distances.

The seventh annual meeting of the Entomological Society of Canada was held jointly with the fifth annual meeting of the Entomological Society of Alberta at the Marquis Hotel, Lethbridge, from October 29 to 31. A total of 178 members and friends attended, including 14 from the United States and other countries and 10 wives. R. Glen, President, Entomological Society of Canada, presided. Addresses of welcome were given by C. W. Farstad, President, Entomological Society of Alberta; Mr. A. W. Shackleford, Mayor of the City of Lethbridge; Mr. H. Chester, Superintendent, Canada Experimental Farm, Lethbridge; and Dr. W. C. Broadfoot, Chief, Science Service Laboratory, Lethbridge. At the opening session, Dr. Glen gave a timely account of the complex relations of an entomological society to other scientific societies. Concerning co-ordinating bodies he discussed especially the roles of the International Council of Scientific Unions, the American Institute of Biological Sciences, and the Canadian Federation of Biological Societies, the last of which had been formed at Ottawa on October 11, 1957, with four member societies.