Time of flight.—Species single brooded; butterflies to be found during late April and early May. I have taken the male as early May. I have taken the male as early as th 11th of April, but usually the first imagoes appear about the 20th. They become abudant by the first of May, after which time the females may be observed oviposting, and the males rapidly disappear. After May 10th worn individuals only are seen, some of which may endure even to the end the first week in June.

The season was a very unsatisfactory one for Lepidoptera in my neighbourhood, so far as quality was concerned, and yer several new species turned up—new, that is to say, to this district—and there were sundry other occurrences which I think may be worthy of record.

A Geometrid moth sent to me for determination by Dr. Fletcher some time ago, appears to belong to the well-known European species, Himera pennaria, Linn. This species has not previously been recorded as occurring on this continent, and there is always the suspicion of a mistake when a species belonging to the Old World fauna is reported in America for the first time; but this species is distinctly labelled as captured by Mr. L. Fanshawe at Tamarisk, Manitoba, and I see no reason to doubt the genuineness of the record.

In a recent paper on the genus Chloroperla I divided this genus, as it had been used, into two genera; neither of which being a true Chloroperla, I proposed the names Isoperla and Alloperla. The character I used in this division was one proposed by Prof. Needham to separate the Perlini from the Nemourini. This is the condition of the median vein near the base of fore wings, whether united to the radius, or running parallel to the radius.

Cyathissa quadrate, n. sp.—Ground colour creamy-white, more or less washed with luteous, the maculation black, contrasting. In type it is like that of percara, and the lines are identical in course; there is the same basal dash, and the quadrate pale blotch on the costa in median space is very similar. But there is no green shading whatever in the wing, the black markings are more intense, more contrasting, usually broader, and, in the median space, they extend below the costal pale area, shading into smoky-brown at about the middle of the wing.

Of late years there has been a considerable demand for information relating to insects which are found in houses, and which either annoy the occupants by their direct attacks or are injurios to household goods and provisions. It is therefore hoped that the contents of this article will be found of interest and practical benefit to those who have experienced the ravages of these minute insects.

Of the water-bugs, perhaps Ranatra and Nepa are better known than the others in their anatomy and earlier stages. Dufour's classic on the anatomy of Nepa cinerea, L., and Ranatra linearis, L., has been followed by the work of other investigators in these two species, and the peculiar filamentous ova of the two genera have long been favourites with students. But neverthless, thus far no compelte life-history has been worked out for either of them.