130 THE CANADIAN ENTOMOLOGIST. 



BOOK NOTICE. 



Jacobson, G. G., and Bianchi, V. L. Orthoptera and Pseudoneuroptera 



of the Russian Empire and adjacent countries. After Dr. K. Tumpel's 



" Die Geradfliigler Mittel-Europas," Part I., pp. 1-80, tab. I.-V. St. 



Petersburg. 1902. Ed. by A. Devrient, 4to. (in Russian). Price, 



complete work, about $7. 



The authors of this work have for their object to collect all possible 



information concerning the fauna of the superorders of Orthoptera and 



Pseudoneuroptera in the above-named geographical limits, and to give the 



keys for identification of all species inhabiting this extensive area, 



comprising almost all Europe (except south-west) and the north of Asia 



to the Himalayas and Central China. 



The first part of the work, just published, contains introduction, keys 



to the nine orders, an almost exhaustive bibliography of the subject (over 



921 Nos. concerning the Orthoptera genuina alone), and an account of the 



order Dermatoptera — " earwigs." The latter is accompanied also with 



a bibliographical list (166 Nos.) and the keys to the genera and all the 



species inhabiting the above-mentioned countries. The account of the 



geographical distribution over the vast Asiatic portion of Russia is of great 



interest, being quite new and elucidating some important facts in this 



respect. The synonymy, very surprising in certain cases, is based on the 



strong laws of priority. 



Taking into consideration the great faunic affinity of both the North 



American and Eurasian continents, we must acknowledge this work, when 



continued and completed with the same skill and accuracy, will be very 



useful to every investigator of these insects in North America. The 



Russian language will not offer any great inconvenience to the serious 



student of these orders. Nicholas Kusnezow, 



St. Petersburg. 



Mailed May 6th, 1902. 



