Twenty new parasite–host records for 16 North American species of Ichneumonidae are given. Hosts were collected in southeastern and interior Alaska.

Water beetles from the Canadian Arctic available in museums often lack any specific ecological data. In consequence, I was pleased to receive for study the specimens collected by Dr. D. G. Frey and Mr. J. B. Stahl on Southampton Island (Northwest Territories) while they participated in an expedition sponsored by the Indiana Gear Works of Indianapolis, Mr. John Buehler, President. The beetles were collected during the period August 10 to 26, 1957, in connection with limnological studies and are accompanied bv detailed notes on the habitats and associated organisms. I am especially indebted to Dr. Frey for allowing me to use and paraphrase his personal notes on the expedition. Mr. H. B. Leech of the California Academy of Sciences has kindly checked the determinations.

In describing C. retecta and C. flebilis, it appears from Mr. Hulst's statements, that I included certain dark shaded specimens, one or more or retecta, under flebilis. Mr. Hulst says:-“The typical specimens in Phila. cover both species.” This may be true, as also that Mr. Strecker figures a dark shaded retecta as flebilis. I have not his work. But there is not doubt in my mind as to what was flebilis, and there is no excuse for Mr. Hulst's renaming my species as luctuosa.

The economic importance of research in veterinary–medical entomology is inadequately defined. In this paper we attempt to assess progress in bioeconomics and feasible approaches to estimate benefits from this field of study.

Benefits accruing from veterinary–medical entomology are in improved efficiency or increased productivity of man and his animals. Assessing this effort has been neglected because of difficulty and expense in measuring loss. Even if direct losses were known, indirect ones due to insect-borne diseases and other health-related factors are generally immeasurable.

A frequently used method for determining the threshold temperature for insect development is based on the expression for the hyperbola and its reciprocal (Bean 1961). This method has certain disadvantages, the major one being that the developmental velocity curve is sigmoid and the selection of a linear portion of this curve has a subjective element (Morris and Fulton 1970).

Early this spring (1928) several complaints were received by the Department of Biology of the University of Toronto, of infestations of dwelling houses by Dermestids. The most pronounced case was in a new house in the newer section of North Toronto where beetles had been appearing in such numbers that their presence and continued reoccurrence was driving the tenants to hysterics and to the point of moving out of the house. Specimens brought in proved to be Anthrenus scrophulariae Linn. larvae and adults.

The Ray Spiders live a retired life along the banks of some creek, where overhanging bushes and projecting rocks afford the gloom which they seem to seek. In such locations, especially in the dark recesses under clusters of roots, we may look for their cocoons in midsummer. They are among the most interesting to be found—little golden-brown balls, about one-eighth of an inch in diameter, suspended by a single glossy-white thread nearly an inch long.

The latitude stated in the former paper should have been 26° 40°. This winter my location was six miles south from Pitt's Island, where the collecting was done last season. From February 1st to May 6th is the time included. During February and March few beetles occurred, as the temperature ranged from 52° to 74° and on one occasion fell to 27°. From the 10th to the 24th of April no collecting was done, and all but a few of the species enumerated were taken between the latter date and May 4th. The species not known to the writer to occur north of Florida are marked with a *; those extending westward around the Gulf, with a †; the others have a wide northern aud western distribution. Philonthus micans is to be erased from the previous list, as that species does not occur in Florida, the black form of alumnus having been erroneously so determined.

This paper includes descriptions of a new genus and a new species of the hymenopterous family Aphidiidae, which are primary parasites of aphids (Homoptera: Aphidoidea). The new genus, Boreogalba, belongs to the subtribe Trioxina and represents a primitive sideline of the Trioxys-Binodoxys group.

The specimens are hardly to be distinguished from Eastern material; they are perhaps a little larger, and of a little different tone of color. My determination of this species as lycarum H.-S., based on a figure, is probably incorrect. It seems possible that Harris has described. A. Cochranii under the name messoria, which should then be retained. More Material of A. fuscigerus (ante No. 15) shows that this is a good but variable species, both in size and color. There is always a uniformity in the disposition of the ground tint over the primaries above, and usually the broad inner lunulations of the t. p. line and the median shade are characteristic.