Feeding adults of the Oriental fruit moth, Grapholitha molesta (Busck), on a tagging solution of P32 containing 20–50 μc./ml. had no apparent effect on their longevity, mating, fecundity, and motility or on the viability of their eggs. The rate of 20–50 μc./ml. was in the range used for dispersal studies. Moths thus tagged had radioactivities of about 1500–2500 c.p.m.

Female moths fed on solutions of P32 at 100 μc./ml. showed counting rates of more than 5000 c.p.m. These females, when mated with normal males, laid approximately 33% fewer eggs than normal females. Also, the fertility of the eggs was reduced by about 25% when only the female parent was radioactive and 15% when only the male parent was radioactive to the extent of over 5000 c.p.m.

Dactynotus caligatus is described. It is a large green aphid that infests Solidago spp., and can be readily distinguished by the two parallel rows of tubercles on the dorsum of the abdomen.

A new species, Roederiodes petersoni, described from Utah, is a member of the juncta group, distinguished by its smooth face and incomplete postocular bristle row. Brief notes on distribution and synonymy of other species of the genus are given.

Colpocephalum strangei is described from the falconiform, Phalcoboenus australis, from the Falkland Islands, and C. javensis from the piciform, Dryocopus j. javensis, from Thailand.

Lyctocoris mexicanus new species is described from Durango, Mexico. Genital structures are compared to those of two closely related species, L. okanaganus Kelt. & And., and tuberosus Kelt. & And., and to those of elongatus (Reut.).

Thelaxes albipes is described. It is the second species known to occur in North America and is easily distinguished by its very pale tarsi.

Eleven species of buprestid larvae of the genus Chrysobothris selected from the H. E. Burke Collection of the United States National Museum are described in this paper. They are: C. bacchari Van Dyke, C. costifrons Waterhouse, C. debilis LeConte, C. dolata Horn, C. edwardsii Horn, C. ignicollis Horn, C. lucana Horn, C. mali Horn, C. nixa Horn, C. octocola LeConte, and C. tranquebarica (Gmelin). The genus of host plants for each buprestid species and the insect's geographical distribution are listed.

Dasystoma salicellum Hbn., a European species first found in North America in 1955, has become a serious pest of commercial highbush blueberries in the lower Fraser Valley of British Columbia.

The species is univoltine, photopositive and has a wide range of hosts. It feeds most often on Salix, Spiraea and Vaccinium. The moths emerge from mid-March to early April and lay eggs in the leaf axils and under bud scales and loose bark. The eggs hatch in late May. The larvae have six instars. The first instars are often dispersed by the wind. Later instars tie new leaves together for shelter, feed on leaves and blossom buds and sometimes enter the early fruit. At harvest the larvae are almost mature and large numbers are dislodged into the crates by picking machines. In September they sometimes defoliate the bushes. In October they pupate within their leaf shelters and drop to the ground with the leaves to overwinter.

Some pupae are destroyed by mould; others are parasitized by Itoplectis quadricingulata (Prov.) and Compsilura concinnata (Mg.). The larvae are parasitized by Macrocentrus iridescens French, and the adults by Tomosvaryella species.