308 THE CANADIAN ENTOMOLOGIST. 



feet ; dorsal band light browa, scarcely yellowish in the centre of the 

 large patch, slightly frosted with purplish, darker on the edge and with a 

 narrow yellow border. The band is retracted at joint 4 to the slight 

 single dorsal fold on joint 3 posteriorly, reaches the spiracle on joint 8, 

 not conspicuously incised on the folds, retracted at joint 11 posteriorly, 

 then nearly straight to the anal plate. Tails with two greenish-yellow 

 rings ; horns spiny, setae stiff. 



Stage IV. — This has not been previously described. The larva 

 which I bred to fourth stage had the proper width of head (2.5 mm.), but 

 it exhibited smooth cervical horns and the other characters of the final 

 stage, thus maturing with only four stages. The coloration was as 

 described for the full-grown larva. The structures on joint 3 which 

 Professor French calls " tubercles " consist of a fold of skin divided by a 

 dorsal depression into two rounded humps, not bearing any set;^. 



Stage V. — Other larvse found when full-grown had a width of head 

 of 3.1 mm., thus indicating that five stages also occur. Dr. Packard 

 quotes Prof. French's description of this stage, which has been already 

 published in Can. Ent., XIII., 144. 



BOOK x\OTiCES. 



Economic Entomology for the F'armer and F'ruit-Grower, and for use 

 as a Text Book in Agricultural Schools and Colleges ; by John B. 

 Smith, Sc. D. Philadelphia : J. B. Lippincott Co., 1896. (Price, 

 $2.50.) 

 It is rather remarkable, when the self-evident importance of the 

 science of economic entomology is considered, that until Professor Smith 

 issued his excellent manual, which has just appeared under the above title, 

 there was no one American book which a farmer could consult to find the 

 names and proper remedies for the common crop pests which would come 

 regularly before him in a year's working of his land. The author, in his 

 long experience, first as a member of the staff of the United States Ento- 

 mologist at Washington, and subsequently as State Entomologist of New 

 Jersey, has had great opportunities of becoming thoroughly informed on 

 his subject. That he has made the best use of these opportunities is 

 evidenced by the excellent book which he has now produced. The best 

 way to test anything is to use it. Thus, if anyone wishes for information 

 upon anything within the limits of economic entomology, the subject of 



