Tropidophryne melvillei Compere is apparently indigenous to the region of Kenya Colony, Africa, where it was found to parasitize Pseudococcus sp. (Compere, 1939). In 1948 this parasite was introduced into California from Kenya Colony by the Division of Biological Control of the University of California Agricultural Experiment Station (Smith and Flanders, 1949).

The large scale production of Coccinellids at the Fontana Laboratory, Commonwealth Bureau of Biological Control, Fontana, California, for shipment to Bermuda where they are used against the Diaspine Cedar Scale, Carulaspis visci Schrank has created a variety of problems. Potato tubers are being used to rear the Diaspine scales Aonidiella aurantii Mask., Aspidiotus lataniae Signoret, and Aspidiotus hederae Vallot for host material for the Coccinellids Zagloba ornata Casey, Cephaloscymnus occidentalis Horn, Microweisea suturalis Schwartz, Lotis nigerrima Casey, Lotis neglecta Muls., Pharoscymnus exiguus Weise, Telsimia sp., and the Nitidulid Cybocephalus sp. One of the outstanding difficulties was the damage caused by several species of predaceous mites as contaminants in our production program. The elimination of these mites led to the rather novel use of miticides as a means of sanitation control. The results although effective were open to experimental error. This preliminary report deals primarily with the effectiveness of Neotran on these mites, Hemisarcoptes malus Schimer, Iphidulus sp., Tyroglyphus americanus Banks, the associated effect upon the praducrion of the Diaspine scale Aspidiotus lataniae, and the subsequent effect on the prodection of the Coccinellids.

The fulgorids of the genus Laccocera Van Duzee were revised by Penner (1945. J. Kansas Ent. Soc. 18: 30-46), who described and figured the seven species known to occur in North America. In all, five species are represented in the Canadian National Collection. One of these is previously undescribed, and three others have not been recorded from Canada previously. The following are a description of the new species and records of other Canadian species from specimens in the Collection.

The factors responsible for the relative resistance of plants to aphid attack are not very well known. Chemical analyses of several varieties of peas indicate that the quantity of nitrogenous constituents in plant juice is proportional to the susceptibility of the plant to aphid attack. These tests hare also demonstrated that amino acids represent the major portion of the soluble nitrogenous constituents in the plants studied.

By the method of paper partition chromatography, several qualitative and semi-quantitative analyses were made of the amino acids in juice extracts of two varieties of peas and of pea aphids feeding on these varieties. This particular method of chromatography, first developed in England in 1944 by Consden, Gordon, and Martin (1), and modified since by other workers (2, 3), was found very effecrive for these studies.

Interest in honey bee toxicology has recently received a fresh impetus as a result of the development of many new insecticides and the more general appreciation of the honey bee as an important pollinator. In particular, for seed setting in many legumes the honey bee appears to be essential. This bibliography is therefore presented at this time to serve as a guide to the literature. The extent of the literature is considerable: the bibliography is extensive, but it would be unwise to claim that it is complete. It contains references up to the fall of 1949.