August, '10] REVIEWS 885 



periment station, an appointment which he declined in order to com- 

 plete his graduate course. He left several papers on economic sub- 

 jects in form for publication, including one on the food of the com- 

 mon mole, now in press as a bulletin of the Illinois State Laboratory 

 of Natural Historv. S. A. F. 



Reviews 



Chermes of Maine Conifers, by Edith M. Patch, Me. Agric. Exp. 

 Sta. Bui. 173, p. 277-308 ; Fig. 108-146, on 11 plates. March, 1910. 



The present paper in an account more or less popular in its nature of all the 

 species of Chermes which have been studied by the author as attacking con- 

 iferous trees in Maine. The paper treats of seven species, six of which form 

 galls on spruce trees, three being previously described elsewhere as new by 

 Miss Patch. One of these, C. pinifolUe Fitch, also occurs on white pine, as 

 does the seventh species, C. pinicorticis Fitch. These two species have been 

 confu'^ed under the name of C. pinicorticis by writers for the past forty years. 

 C. pinifolice was described by Fitch more than fifty years ago, but several of 

 the later writers have regarded it as a synonym of C. pinicorticis. Recent 

 studies by Miss Patch show them to be distinct, and C. pinifoli(e Fitch has 

 therefore been reinstated by Miss Patch. Chermes (Adelges) abieticolens 

 Thomas has for several years been regarded as a synonym of C. abietis Linn., 

 and it interests us to learn that it Is identical with C. pinifoliie Fitch, and that 

 this species attacks both pine and spi'uce. 



The reason for crediting the species abietis to Cholodkovsky instead of 

 Linnaeus does not appear to be explained in the paper. 



It is a source of convenience to working entomologists to have several 

 species thus treated in a single paper, especially when the literature was 

 widely scattered and inaccessible, as has been the case with the genus Cher- 

 mes. Miss Patch has apparently done some careful work, and should be con- 

 gratulated on the results of her studies and observations. It now remains 

 for some one to make a more careful and extended investigation of remedies, 

 and this is important because at least two species, C. abietis and C. pini- 

 corticis, are serious pests of cultivated Norway spruce and white pine trees. 



It will also be interesting to know how many of the species catalogued 

 from Maine are found in other states. 



The drawings and photographs reproduced in the plates are excellent, and 

 of great help in showing the characteristic appearance of the different species 

 of Chermes and their galls. W. E. B. 



Gypsy and Brown-Tail Moth Suppression, by F. W. Rane, State 



Forester. St. Forester of Mass. 6th Ann. Kept., Prt. 2, 1909, p. 65- 



109. 



The author states that the larger part of the known infested area is in most 

 cases in a better condition than at the close of the preceding year. The 

 spraying operations have been on a larger scale than ever, high pressures. 



