The knowledge of our Arctic insect fauna is of so fragmentary a character that any contribution thereto is of special interest and value to Canadian entomologists. I am indebted to Dr. Hans Kiaer, of the Museum of Tromso, Norway, for a copy of an exceedingly valuable catalogue entitled “Die Arktischen Tenthrediniden,” * an examination of which emphasizes this fact. His introduction points out that in Candad little is known of the forms occuring north of St. Martin's Falls, Lat. 51°, whereas in Norway species are recordd from as far north as Lat. 70°. Of 228 species enumerated (including 12 of Siricoidea) Arctic Scandinavia furnishes 132, Nove Zemlya 18, Spitzbergen 6, Iceland 3, Greenland 2, Hudson's Bay region 59, Alaska 8, and Arctic Siberia 11.