THE CANADIAM HNTUMOI-OCIST. 117 



sorghum and maize, with results of the analysis of the constituents of these 

 plants at different periods of their growth, ]mrticularly in reference to the 

 available sugar contained in them. This valuable section of the work is 

 illustrated by 21 plates, and contains also much other useful matter in 

 reference to analysis of soils, fertilizers, etc. There is also a report from 

 the Superintendent of Grounds, in which he gives the good results of 

 mulching the ground with refuse tobacco stems, as a remedy for thrips on 

 foreign grape vines grown under glass, and submits notes on a number of 

 tropical and sub-trojMcal plants, some of which might probably bt culti- 

 vated with success in Southern California or Southern Florida. 



That part of the report devoted to Entomology is extremely interest- 

 ing, and contains much that is valuable; it occupies 154 pages and is 

 illustrated by 20 plates. The chief subjects treated of in Prof Riley's 

 portion are Silk-culture in the United States ; Pyrethrum — its history and 

 cultivation : the Arm}- Worm, Scale Insects of the Orange, including the 

 results of experiments with emulsion of kerosene oil for their destruction ; 

 Insects affecting the Rice Plant ; Corn Insects, the Cotton Worm, Clover 

 Insects. In that part contributed by Prof Comstock we find a very com- 

 plete history of the Apple Maggot ; also of some allied species of Droso- 

 phila ; a chapter on Lady-birds, and another on Lac Insects, all illustrated 

 by excellent plates drawn by Mrs. COmstock. Some valuable information 

 is also given on methods for destroying Scale Insects with alkaline 

 solutions. 



Insects Injurious to Fruits ; by William Saunders. Philadelphia : 

 Lippincott & Co., i vol., 8vo., pp. 436. 



It is with very great pleasure that we announce to our readers the pub- 

 lication of Mr. Saunders' admirable work on the Insects Injurious to the 

 Fruits of North America, — as the volume includes those affecting the 

 orange, the oli\e and the fig, we think that we may fairly apply this ex- 

 tended title to it. As the readers of the Canadian Entomologist are 

 aware, there is no one in Canada, and very few indeed in the whole of 

 America, so competent as our esteemed Editor to produce a work of this 

 character. It is needless for us, then, to say more in praise of the work 

 than that it is the crowning achievement of one who has devoted a large 

 portion of his time and labor during the last twenty years to the practical 

 study of insects, and whose intimate acquaintance with fruit culture in all 



