The western hemlock sawfly, Neodiprion tsugae Middleron, first came to our notice from the Queen Charlotte Islands, British Columbia. In 1931, reports of the dying of hemlocks over large areas came from rangers and timber operators of this region. A survey conducted by Mr. W. G. Mathers of the Dominion Entomological Branch, in September and October of that year, indicated that the injury extended over approximately forty square miles. In 1932, the outbreak showed definite signs of subsiding, and had practically disappeared by 1933, although many trees were killed during the peak year of 1931, indicating that this is a primary enemy of western hemlock, and that outbreaks may be expected from time to time in the Pacific Northwest.

Above brighter ochre than any American form except subfusca Barnes and Benjamin, from Arizona. The entire upper surface is a tawny ochre that in some males is dusted with gray near the margins. The fringes are nearly white and contrast sharply. Under side of the primaries lighter ochre, crossed by a very distinct, long postdiscal band of white; the margins are washed with gray-white. Lower surface of the secondaries gray or brown dusted over with grayish white and crossed by an irregular median band of white that in some specimens sends projections into the basal anea. Apical ocelli on the primaries and submarginal ones on the secondaries are strong, obsolescent or not present at all.

Color : Entire body light yellow tinged with pale green; legs pale yellow; wings hyaline.

Measurements : Alate viviparae-Body length, 2.18 mm. ; width across eyes, .435 mm.; hind tarsi, . 115 mm.; antenna, 1.49 mm.-1.51 mm.; 111, .53 to .57 mm. ; IV, .30 to .34 mm. ; V, .33 to .35 mm. ; VI, .184 plus .I15 mm. ; cornicles, .023 mm. long. Cauda .06 mm. from neck, .115 mm. entire length.

The Pediculoididae are so strongly sexually dimorphic that there is little resemblance between the sexes, necessitating two sets of keys. As I am particularly interested in the females, they only are here discussed.

In Pediculoides the abdomen tapers posteriad to a blunt point, in all the other genotypes the abdomen is more or less truncate and angular behind. Pygmephorus (often misspelled) has tarsi I swollen and much longer than tibiae I. In Pediculopsis they are subequal. Resinacarus also has large tarsi I. In figure 12 the line around the middle of tarsi I is to be taken as a constriction rather than a segmental boundary. The bristles of legs I are not identical in figures 9 and 12, nor are the bristles of dorsal plates I and III. Resinacarus has three pairs of prothoracic bristles while the type of Pygmephorus has two pairs.

Last September, my wife and I visited the Prince Albert National Park, particularly to see Grey Owl and Anahareo and the beavers at Ajawaan Lake. The country was entirely new to me, and I found very much of interest. Saskatchewan is divided into two very different parts. The southern half has some large lakes, but is essentially a prairie region, where vast quantities of wheat are grown. As we crossed a portion of it travelling from Calgary to Saskatoon, the landscape was monotonous and not very interesting. But the northern half of the province is in complete ccntrast. It is a land of dense forests, with innumerable lakes, large and small. These lakes are warm enough in summer to be the delight of innumerable bathers, but covered with thick ice all winter. This region is in the Canadian zone, whereas the prairie region belongs to the Transition. In the northern (especially north eastern) part of the province is a large area in the Hudsonian zone, sufficiently distinct in aspect to be easily recognised from an aeroplane, I was informed.

The species of flesh-fly under consideration are Wohlfahrtia vigil Wlk., Calliphora crythrocephala Mg., and Lucilia sericata Mg.

Oviposition under laboratory conditions occurred in most cases at night. Under outdoor conditions wild individuals of these species were observed to oviposit only during the day. Lack of disturbance in the cages is suggested as the deciding factor, since temperature and light were kept constant night and day.The site of oviposition preferred is the undersurface of a dry ledge of the meat. On being disturbed the ovipositing female is loth to leave the site.