There is in Ontario a water area of approximately 80,000 square miles which is about one-fifth of the total area of the province. As this water area is so great in extent the life of whiich it cointains is significant economically as well as biologically.

In every body of water, stream, pond, or lake there is a community of living organisms the individuals of which are practically independent of life outside of the water but which are absolutely inter-dependent upon one another.

Within the last few years parasites have become of increasing importance in the control of the oriental fruit moth, Grapholitha molesta Busck. Dr. Van Steenburgh, in a paper to be published in the Report of the Entomological Society of in Ontario for 1934, has reviewed their importance in Ontario and has shown that Glypta rufiscutellaris Cress. is the predominant native species, ranking next to the introduced Macrocentrus ancylivorus Roh. Cremastus minor Cush. is of secondary importance, while the other species occur only in small numbers.

Oval, slightly oblong, moderately robust, rufocastaneous to brown, dull,Clypeus feebly emarginate, the margin narrowly reflexed, coarsely and deeply punctured, frontal suture not deeply impressed. front more coarsely punctured and with short erect setae. Pronotum obtusely angulate, the lateral margins coarsely crenate and with rather long ciliae, punctures moderate in size separated by 2 to 3 times their own diameters slightly denser near margins, each puncture bearing a short semi-erect seta, median smooth line indistinct to absent in some specimens. Scutellum wider than long, punctures fine and shallow each bearing a short seta, evenly distributed. Elytra with punctures finer than on pronotum separated by 2 to 3 times their onn diameters, each puncture with short semierect setae, longer setae arising from punctures on each side of the scutellum and along the sutural costae and lateral margins, sutural costae well defined, others obsolete.

The present paper presents the results of a study of a number of dissections of the reproductive system of the cherry case bearer, Coleophora pruniella CI. while making observations on the general morphology and biology of this species. The work was done while located at the Peninsular Branch Experiment Station at Sturgeon Bay, Wisconsin.

The Male (Fig. I)

The reproductive system of the male is decidedly more simple than that of the female and its essential features agree with those described for other Lepidoptera.

In recent rearings by officers of the Entomological Branch several new species of Braconidae have been secured as well as records of species hitherto little known in Canada. The writer wishes to express his indebtedness to Dr. C. W. F. Muesebeck for his assistance in examining three of the species described below. Paratypes of all the species are deposited in the United States National Museum.

Increasing interest in limnology, aquatic biology and related sciences, has been one of the main factors in turning the attention of systematic coleopterists to this family of small beetles. Many new species have been added to the catalogue recently, and it seems probable that there are many more nearctic species yet to be described. It is with the idea of fostering the growing interest in this group that the following notes are offered from an experience of severa1 years' searching for these small, slow-moving, inconspicuous beetles.