The following notes report the occurrence in Nova Scotia of Sthereus ptinoides (Germ.) and indicate the distribution in North America of 35 species introduced there from the Old World. Of the Old World species, ten are reported from America for the first time; previous records of two others are probably erroneous. Two, which were named and described in Rhyssemus Muls. and Scolytus Geoff. as species native to America, are considered introduced, and new synonymy is proposed for them. Confusion of introduced with native species is noted in Stethorus Weise and Rhinoncus Schön. The material recorded from Newfoundland was collected in the Northern Insect Survey, which is a co-operative project of the Canada Department of Agriculture and the Defence Research Board, Canada Department of National Defence.

In his recent revision Rupert (1949) has focused attention on the geometrid genus Plagodis. In the present paper the writer presents descriptions of larvae of three of the four Canadian species in this genus and of the larvae of Anagoga occiduaria (Wlk.) and Hyperetis amicaria (H.-S.). Forbes (1948) notes that these three genera make a neat subgroup in the tribe Anagogini and indicates that there are differences in the larvae. From studies during the summer of 1949 it was determined that there are differences in these larvae; and the differences, along with the similarities, are set forth in this paper.

In the winter of 1939 a sample of mites from salted steer hides was sent to me from Buenos Aires for identification with the note that they were present in great numbers in this habitat. As upon examination these appeared to constitute a new species sufficiently unlike the existing representatives of the genus Pontoppidania to preclude its inclusion in that group, the erection of a new, but closely allied genus, seemed to be warranted. Because of the peculiar nature of its habitat and because of its association with hides the name Diphtheroglyphus has been given to this group.