In 1915 Wickware reported on an investigation at Ottawa, of a serious disease which had appeared anlong ducks. Examination of the blood of affected ducks showed the presence of a protozoon parasite which Wickware named Leucocytozoon anatis. O'Roke (1930) reports that the disease is apparently not harmful to adult ducks, but is pathogenic to ducklings, the mortality being 35 per cent in the cases studied.

Aphis populifoliae Fitch, Rept. Reg. N. Y. St. Cab. Nat. Hist., p. 66; 1851.

Color:—Head and thorax reddish-brown, abdomen light green with light shadings, powdery on intersegmental lines. Legs, antennae and cornicles yellow to light brown.

Structural details:—Hairs numerous and erect with lengths from .69mm. to .79 on antenna, approximately the same length on vertex. Secondary sensoria from 16-19 in number on III on alatae and arranged in an irregular row, absent in apterae.

Through the courtesy of Professor R. A. Cooley, Dr. William C. Cook, and Professor G. Allen Mail of the Montana Agricultural Experiment Station, from 1927 to 1931 I examined various portions of the station's collection of Coleoptera. In view of the paucity of Montana records of this order it seemed desirable to publish a list of the species obtained in this way.

In order to clear up certain doubts which had arisen regarding the identity of several Heptagenine species, placed at present in the genus Ecdyonurus, and described by Clemens from material collected in the Go Home Bay region of the Georgian Bay (1913, Can. Ent. XLV, 246-262), Mr. G. S. Walley spent the months of June and July, 1932, in this same locality, collecting and breeding nymphal material. In the group in question he was most successful in securing both nymphs and bred adults of all the species listed by Clemens; the present article, therefore, is presented with a view not only of rendering definitely recognizable certain of Clemens' species in which the original diagnoses were rather brief and incomplete, but also of correcting some specific misidentifications occurring in Clemens' paper.

In the May, 1932, number of the Canadian Entomologist, G. Chagnon records observing an insect resembling an ichneumonid walking down the stem of an aquatic plant into the water.

This habit in the genus Agriotypus has been known for many years. These insects are parasitic in the cases of caddis flies, entering the water by walking down the surfaces of stones or plants to parasitize their hosts.