Notes and records are given for the species in the nine subfamilies of Scarabaeidae occurring on Jamaica. New records for Jamaica include Ataenius scabrelloides Pet. and Ataenius havanensis Balth. in the Aphodiinae, and Hybosorus illigeri Reiche in the Hybosorinae. The following new taxa are described: Cioeotus farri n. sp. and Cloeotus pecki n. sp. in the Acanthocerinae; Anomala sandersoni n. sp. in the Rutelinae; Stenocrates beckeri n. sp., Calypsoryctes dynastoides n. g., n. sp., and Epiphileurus jamaicensis n. sp. in the Dynastinae. Reasons are given for considering the deletion of at least four names from the lists of Jamaican Scarabaeidae.

This review of the genus Psychoglypha Ross includes a discussion of the eight species currently assigned to the genus and the description of seven new species. The new species are from Oregon, California, Nevada, and Idaho. Except for one species, all members of the genus are northern and western in distribution. The majority of species are cold-adapted and may be found late in the season.

The droplet range of a water spray is conveniently described by trapping the droplets in a viscous polybutene, measuring their diameters with an image-splitting eyepiece, calculating cumulative percentage volume and cumulative percentage number, plotting both on log–log paper, and noting the mass median and number median diameters. A ratio, MMD/NMD, is suggested as useful for comparing sprays.

Studies on non-treated plots at Harrow, Ontario, in 1967 and 1968 and at Kentville, Nova Scotia, from 1963 to 1968 inclusive showed that residues of viruses of the cabbage looper, Trichoplusia ni (Hübner), found in soil were related qualitatively and quantitatively to the virus residues on leaves of cruciferous plants grown in the plots and to mortality by viruses in the host populations. At Harrow where the cabbage looper is common and where virus diseases occur naturally in field populations, the viruses that occurred in the populations of the host built up in soil as the season progressed. At Kentville where the host is rare, virus was rarely found in soil or on foliage. The typical nuclear-polyhedrosis virus, an atypical nuclear-polyhedrosis virus that formed abnormally large polyhedra, and a granulosis virus were found at Harrow, with the typical nuclear-polyhedrosis virus predominating. Only the typical nuclear-polyhedrosis virus was detected at Kentville.

An efficient oviposition cage for the codling moth, Carpocapsa pomonella (L.), is described and illustrated by photographs and line drawings. Essentially, the cage is a revolving drum with waxed paper walls (the oviposition surface) and wire screen ends. Use of this cage achieves satisfactory egg yield per female moth, uniform egg distribution, and easy and quick replacement of the oviposition surface without handling the moths.

Wood and bark extracts from balsam fir, red cedar, spruce, hemlock, and pine were assayed for juvenile hormone-mimicking activity on pupae of the wax moth. All the extracts showed noticeable activity; the wood extracts were generally more active than the bark extracts. The results suggest that the purification of the extracts from these conifers might lead to the isolation of compounds with high hormone-mimicking potential.

An outbreak of a sawfly, Pamphilius phyllisae Middlekauff, was discovered on northern red oak at Linn Run State Park, Pennsylvania, in 1964. The outbreak was unusual and probably unique because this previously unknown species suddenly attained populations of over 1 million ultimate instar larvae per acre. The reasons for the outbreak are not known but it arose near the end of a period of abnormally low precipitation and at a time when nearly complete encapsulation of parasites by the sawfly larvae was observed. The insect is confined to northern red oak, Quercus rubra L., and has a life cycle of 1, 2, or more years of which about 6 weeks are spent on the host tree. The life history, the history of the infestation, and the immature stages are described.

Field populations of the European red mite, Panonychus ulmi (Koch), in Nova Scotia were separated into eggs, larvae, protonymphs, deutonymphs, and adults and the length of time each stage was present for each generation was determined in 1967 and 1968. The duration of each generation was similar in both years, although the diapause eggs hatched later in 1967 than in the succeeding year. Detailed information on the seasonal history is necessary in assessing red mite mortality and in timing of chemical controls of this pest.

Egg production in Neodiprion swainei may be severely reduced by food quality and quantity, tachinid parasitism, and prolonged diapause. Since these and other agents may affect the sawfly both lethally and sublethally and may operate differentially against males and females, population losses are not adequately expressed in terms of numbers of individuals. However, reduction of the potential number of eggs the population could produce provides an integrated measure of these effects. One example, from an experiment in which larvae were fed various quantities and types of foliage, demonstrates that loss of reproductive potential is several times as great as the loss of individuals and indicates that the latter seriously underestimates the importance of food in population events.Cocoon diameter and fecundity are closely related. In a Saguenay Valley population, fecundity, cocoon diameter, and deviations from the regression line were bimodally distributed, indicating a mixture of two types of individuals differing in egg production characteristics. Families within a single population differed from each other by as much as 14 eggs in the elevation of the regression line; this was more than the observed difference in elevation between populations. A single regression equation satisfactorily predicted fecundity in one Quebec and a Wisconsin population, but was unsuitable for two other Quebec populations, each of which required its own equation. Among insects of common size, mean egg length varied inversely with fecundity, but it is uncertain whether differences in egg size were responsible for variation in the fecundity-cocoon diameter relationship.

Biology of the red-backed cutworm, Euxoa ochrogaster (Guenée), was studied in the laboratory to provide new knowledge and for comparison with other cutworm species. The eggs possessed a moderately severe diapause that was terminated more quickly at 5 °C than at higher and lower temperatures. Intensity was related to temperatures of incubation. The eggs were fairly resistant to desiccation. The duration of development of embryos, larvae, and pupae varied inversely with temperature. A diurnal rhythm occurred in emergence of moths from pupae and during oviposition; more than 60% emerged and 85% or more eggs were laid during the night period. Moths mated in the dark. Multiple matings were common, ranging from one to seven and averaging two or three. Egg development at emergence was rudimentary but it accelerated with age after emergence. The preoviposition period in the laboratory averaged 8 days. The mean oviposition per female was 411 and ranged from 251 to 705. Maximum longevity of both sexes was approximately 20 days.

Adults of the web-spinning sawfly Pamphilius ochreipes (Cresson) have been collected widely in North America in the past. The immature stages and food plants were unknown until a recent study was made in southern Ontario where the larvae fed in leaf rolls on cultivated Viburnum opulus L., in June. The sawfly is univoltine and overwinters as a larva in the soil with adult emergence in late May and early June.

This paper notes further systematic changes in the lygaeid subfamily Rhyparochrominae.

Pityophthorus orarius Bright is a small beetle which mines and kills shoots of Douglas-fir. The adult tunnels into the shoot in early summer and lays its eggs. Tunnelling of the larvae causes twig mortality indicated by characteristic "flagging".

Messa nana Klug, a European birch leaf miner which was previously reported in northeastern United States, was recently discovered in southeastern Ontario. Its life cycle and some immature stages are described.

Over 50 species of Cerambycidae have been reared on artificial diet, 17 of them from the egg. The method, which is described, has proved useful in reducing rearing time in the production of larvae and pupae for taxonomic purposes. It has also demonstrated the occurrence of diapause in some species of Cerambycidae. Other potentially fruitful lines of investigation, made feasible by this method, are suggested.

The identities of three closely related species, Prosimulium dicum, P. exigens, and P. dicentum, described by Dyar and Shannon in 1927, are clarified. Keys for the separation of the adult, pupal, and larval stages of these species are given. Also presented is a brief review of the literature for each species. A redescription of the female and first descriptions of the male, pupa, and larva of P. dicentum are provided and important taxonomic features illustrated. A lectotype is designated for P. dicum.