The literature contains many references to the close resemblance of various Orthoptera to the colour of the vegetation and soil on which they occur. Hancock (1911) noted this particularly with the acridid Dissosteira carolina (Linn.) and attempted to determine whether this species changes colour at the critical stage of the last moult. From his experiments he concluded that the Carolina locust does not change abruptly from one colour to another during the critical period following ecdysis, but that the change takes place gradually.

Every student of entomology is familiar with the remarkable sexual dimorphism displayed by simuliid flies. There are not only striking differences in the coloration of the sexes, but also numerous morphological ones, as the different shape of the thorax, the different form of the claws, of the mouth organs, and especially of the eyes, which, dichoptic in the female, are holoptic in the male and are here sharply divided into an upper part with large facets and a lower strongly pigmented part with small ones.

The insects of the genus Melanolophia are forest insects in Canada, the larvae feeding on both coniferous and deciduous trees. McDunnough, in his bulletin discusses five species, three of which are found in Canada.

Very little attention has been paid to the occurrence of Mallophaga in western Canada, particularly in Alberta. The reason for this is two-fold. First, the difficulty of obtaining keys to species and, second, the extreme difficulty of collecting specimens. This paper reports the occurrence of thirty-eight species in the province.

The discarded paper nests of Polistes wasps make excellent nesting places for other species of aculeate Hymenoptera, especially for those species that work in mud. I have already published accounts of such use of the nests by the wasp, Trypoxylon clavatum and the bee, Osmia lignaria. Both of these species clean out old Polistes cells and use them for their own young. With mud they partition the cell into small rooms, provide each with food and an egg, and finally seal the opening with a plug of mud.

The odd-appearing female of Pelecinus polyturator Dru. is a moderately common insect, generally recognized as a parasite of Phyllophaga larvae. However, few references in literature substantiate the host relationship or furnish evidence to associate parasite with host.

Malar space wanting; antennae distant from the clypeal border by a little less than the length of the pedicel; scape with erect hair beneath, dense in the males; pronotum with a long dorsal surface, rounding rather abruptly into a pronounced but not deep vertical surface, and with a short horizontal collar, all this much in Calicurgus, but less abrupt; upper surface of hind tibiae not carinate, but with minute elevations at the bases of spines which scarcely exceed the length of the tibial hair, and are absent at the base of the tibiae; head, thorax, propodeum, coxae and abdomen of the males more hairy than in the species of Priocnemis.