In research on insect immunity, bacterial antigens were injected into Galleria mellonella L. larvae (Stephens, 1959). It was suspected that the quality and quantity of the blood, or hemolymph, might differ if the larvae were obtained from different sources. This note reports the effects of food and storage on the specific gravity and osmotic pressure of the blood, and of storage on the blood volume.

A list of all the known species of terrestrial Arthropods of the Labrador coast may prove convenient as a starting point for future investigations. Hence I have, besides enumerationg the species of ohter groups, revised the list of Lepidoptera—Mr. Sucdder kindly contributing the list of butterflies. For changes in the names of the Torticidæ I am indebted to Prof. C.H. Fernald's excellent catalogue of the Torticidæ of the United States.

Elliott and Soule in ‘Caterpillars and their Moths’ say of the luna eggs—“Luna eggs are as purely white as its own white scales. We have had many eggs of luna, and never one which was not white.”

The chemical composition of plants is one of the major factors influencing their acceptability as food by insects. The interrelationships among these chemicals and between them and insect predators is very complex (Davis 1968). Some are inherently toxic to insects (Singleton and Kratzer 1969); others inhibit feeding (Hsiao and Fraenkel 1968); and still others act both as toxicants and as repellents (Bennett 1965). Apparently, no class of chemical compound is without representation in this regard.

Until recently I have been applying the name caryaefoliella Clem. to the common species of eastern Ontario, the cases of which are found on hickory (C. glabra and C. cordiformis) and which I mentioned and figured in one of my previous papers (1933, Can. Ent., LXV, 161, Pl. X, figs. 19-21). However in early June, 1944, Mr. T. N. Freeman collected a number of cases on shag-bark hickory (C. ovata) at Pt. Rowan in southern Ontario which produced adults very similar in color and maculation, it is true, to our eastern Ontario species, but differing markedly in male genitalic characters.

Length 3.7 mm.; width 1.7 mm. Body form as in palustris Blatch. Black; the elytra with a greenish lustre, not at all bluish: the basal half of the head, antennae, and legs pale red; the basal segment and four terminal segments of each antenna distinctly infuscate; femora and the apical half of each terminal tarsal segment heavily infuscate.

In 1862 H. C. Wood described a new centipede, Mecistocephalus fulvus, which he found “not very abundantly” in the vicinity of Philadelphia. To my knowledge no subsequent worker has ever attempted to refer a centipede to this species, nor has fulvus ever been considered a synonym of any other species, so that for eighty-eight years it has been regarded privately or in print as being incertae sedis.

The confusion surrounding this species has been due primarily to the following considerations: it has never been taken by anyone other than its author; the type is missing; it was highly improbable that this species could be referred to Mecistocephalidae, or even to Mecistocephalus, a genus represented in the eastern United States by a single imported species; and the original description itself refers to a centipede not quite like anything else known to occur in the east.

Holotypes, lectotypes, and syntypes of pyralid moths of the subfamilies Nymphulinae, Scopariinae, Cybalomiinae, Odontiinae, Evergestinae, and Pyraustinae studied by the author at the Zoological Institute of the Academy of Sciences of the USSR in Leningrad in 1964 are catalogued. Types of 93 names are discussed; lectotypes are designated for 54 nominal species; 13 nominal species are listed for which type material could not be located. Four names are considered to be nomina nuda.

The insecticide phosphamidon, both alone and mixed with other chemicals, was tested in the laboratory as a motor stimulant to female spruce budworm moths. For phosphamidon alone, the time to reaction of virgin female budworm (Choristoneura fumiferana) moths was about 40 min. However, small supplements of pyrethrum or synthetic pyrethroids reduced the reaction time to about 3–8 min. The slow reaction to phosphamidon alone could account for the failure of that insecticide to kill gravid females. It is postulated that moths quickly stimulated to flight activity within the canopy would be more likely to acquire a lethal dose of insecticide before the spray cloud dissipated.

Macrosiphum parvifolii is described from British Columbia. It is a heavily pulverulent, almost flocculose species that is known only from red huckleberry, Vaccinium parvifolium Sm.

To have the specimens in a collection look well, and at the same time be in a condition such as to render their examination as easy as possible, it is necessary that they should be properly collected. The ordinary cyanide bottles prepared either with plaster of Paris, or sawdust, which are used for Lepidoptera and Coleoptera, do not furnish good specimens of Hymenoptera, and those collected in alcohol are less satisfactory.

In this group we have in some of the genera a return to the cephalic and thoracic ornamentation by horns or tubercles in the males, as shownin the Coprophaga I however, none of the Canadian species would be thus misplaced by anyone having even a slight acquaintance with the family, as aside from this character the resemblance is slight. From some of the Melolonthinæ they are not so readily distinguished, except by the position of the spiracles, as defined in a previous article.

Greenhouse trials were conducted to evaluate the effect of treating adult and egg stages of the eastern spruce budworm, Choristoneura fumiferana (Clemens), with Insegar, a water-based commercial formulation of the juvenile hormone analog fenoxycarb, or with water (controls) at droplet sizes and densities comparable to what would be achieved through aerial spraying of field populations. When adult moths were sprayed with the juvenoid at dosages equivalent to 15.5, 155.4, and 310.8 g AI/ha, approximately 90% of the eggs that were subsequently oviposited failed to hatch. The efficacy of the compound (60% suppression of egg hatch) was not as high when the egg stages were sprayed directly at 15.5 and 155.4 g AI/ha. Insegar did not affect the egg productivity of the moths.

The effect of temperatures on the development of a virus disease of Neodiprion swainei Midd. was studied at constant temperatures of 30° and 12 °C., and under fluctuating temperatures (15°–20 °C.) in the laboratory and outdoors. Viral concentrations of 30 × 106 polyhedra per ml. and 1 × 106 polyhedra per ml. were used. Only the higher concentration of virus was effective at 30 °C. At 12 °C. the incubation period of the disease was prolonged and mortality caused by the virus was considerably reduced for both viral concentrations. Mortality due to the virus was similar at both viral concentrations for the fluctuating temperatures which were within the optimum temperature range for larval development.

The pale western cutworm, Agrotis orthogonia Morr, has been a serious pest in the semi-arid prairies of Western Canada since 1911. Only recently, however, has an effective control been developed which can be used in the spring of the year of outbreak. Seamans (1938), after many years of field observations, published a non-technical bulletin dealing with a method of control by starving the small cutworms early in the spring.

The South American species of Oplachantha Rondani are reviewed and a key to them presented. New species are atricalx, Peru; pallida, Colombia; albihirta, Colombia; fuscipes, Venezuela; divisa, Ecuador; and atriceps, Peru. New synonymies are (iubata Enderlein) = pulchella (Williston) and (tristis Enderlein) = cincticornis Enderlein. Allognosta Barbiellinii Bezzi, Hoplacantha nigerrima Lindner, and Antissops Bezzii Lindner, sometimes referred to this genus or to Berismyia, belong to an as yet undetermined genus.

Avoidance of four strains of Drosophila melanogaster to the pyrethroid insecticide permethrin was studied. All strains showed concentration-dependent avoidance, with avoidance detected at levels as low as 1 ppm. Avoidance was not dependent on the insect acquiring a lethal dose. Some correlation appeared to exist between higher locomotor activity and lower sensitivity to permethrin. The most sensitive strain had the lowest activity. Two of the four strains studied were chosen as permethrin-sensitive mutants following mutagenesis. These two strains had activity levels significantly lower than the original strain from which they were obtained, raising the question as to whether the increased sensitivity to permethrin following mutagenesis reflects an alteration in the target site of permethrin, a neuroactive insecticide.