While studying the hymenopterous parasites associated with Samia cecropia Linnaeus in the Chicago area (described by Marsh, '34), the writer had an unusual opportunity of observing the egg-laying technique of the cosmopolitan chalcid Dibrachys boucheanus Ratzeburg. This occasion is taken to describe in some detail the actual placing of the eggs.

A monograph of the lepidopterous genus Parnassius has recently appeared as Part 65 of that monumental undertaking “Das Tierreich.” The volume in question comprises nearly 800 closely printed pages and 698 illustrations. The author, Felix Bryk of the Zoological Museum of Berlin, Germany, has long posed as a specialist in this genus of butterflies and is the editor of a publication, “Parnassiana.”

The Scutacaridae are very little understood. Paoli divided the genera chiefly on the basis of presence or absence of ungual hooks on tarsi I and IV. This is patently a superficial and non-phylogenic character. Within a genus all grades of reduction of unguis are to be found so that it is quite conceivable that species without unguis may belong to genera with unguis. Furthermore in each genus one may find, if Paoli's figures are correct, species with dorsal segments, ranging in number from four to six. Yet number of transverse plates, usually regarded as an indication of number of somatic segments, is certainly a more fundamental character than ungual reduction. On the other hand it is quite difficult to determine with certainty the total number of transverse plates in some species. My experience leads me to regard the total number of plates as four, each bearing four bristles. At present this character will have to be disregarded.

Approximately 75 species of Artemisia, or sage, occur in the Rocky Mountain region, many of these being infested by aphids, often to a considerable extent. The great economic importance of several specis of Artemisia as food for range livestock and the incomplete knowledge of the aphids attacking them in Utahled the writers to undertake this study. Most of the report deals with the apterous forms which are most frequently encountered and which possess good specific characters for identification.

In 1930 Dr. R. H. Emslie turned over to the author a small collection of mayfly nymphs collected by him in streams in Scotland. Among them was a small series of nymphs of Ecdyonurus venosus Fabricius in different instars collected at Tummel Bridge and Bridge of Weir. This species is unique in having prominent postero-lateral extensions of the prothorax resembling the wing-pads of the meso- and metathorax (Figs. 1 & 8).