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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. S 



which has been imported into the United States and apparently become 

 established here. Its method of introduction is, of course, unknown 

 but it is probable that a few cocoons on the branches or in the pack- 

 ing material of pines from Europe were overlooked by the inspector. 



Mr. Rohwer has kindly furnished the following references, which 

 apply only to D. simile: 



Hartig, T. — 1834. Forstliches Convers. — Lexicon 2. Aufl. p. 987. (Original 

 account.) 



Hartig, T. — 1860. Die Familien der Blattwespen und Holzwespen, p. 160, pi. Ill, 

 fig. 9 (Original description and a short account of life history and 

 presence around Berlin and Stettin.) 



Baer, W. — 1903. Lophyrus similis Hart. — Naturwissenschaftliche Zeitschi'ift fiir 

 Land- und Forstwissenschaft. vol. 4, H. 2, p. 84-92, 10 fig. (Con- 

 tains many notes but pubhcation is not at present minute available, 

 so cannot be summarized.) 

 . FoRSius, R. — 1911. Medd. Soc. Fauna Flora Fennica, vol. 13, p. 183. (Presence 

 in Finland in 1910.) 



Reviews. 



Key to the Families of North American Insects, an Introduction to 

 the Classification of Insects, by Charles T. Brues and A. L. 

 Melander. Published b}^ the Authors, Boston, Mass.; and Pull- 

 man, Wash., 1915, pp. i-viii, 1-140. 



The past twenty years have witnessed a wide departui'e from the primary seven 

 principal orders of the earlj- entomologists, a process which has advanced by gradual 

 stages and appears to have reached its climax in this tabulation. Most entomologists 

 recognize the necessity of more exactly defining the larger groups and though by no 

 means all will agree with the system adopted in this work, they must admit that it 

 presents within a very brief compass, considering the complexities of the subject, an 

 excellent analytical key. A most praiseworthy feature, not always seen in technical 

 works, is the evident attempt to correlate the system with earher ones and particu- 

 larly to estabhsh a definite relation with economic forms. There are, in addition to 

 the keys, a conspectus of the higher groups of insects, five classes being recognized, 

 brief statements of the ordinal characters, a series of 18 line plates illustrating typical 

 forms or structures, a glossary and indices of both scientific and common names. 

 This laboratory manual wiU be exceedingly helpful to aU entomologists and we hope 

 it may prove a potent factor in estabhshing a more satisfactory aiTangement of the 

 larger groups of insects. 



Erratum. Page 269, line 2 for Carpophilus latinasus read Caulophilus latinasus. 



