512 JOURNAL OF ECONOMIC ENTOMOLOGY [V'ol. 14 



Later, cages without bottoms were set over potted potato plants, care having 

 been taken that the earth was free from eggs or larvae of any sort. Sciara larvae, 

 in particular, are quite apt to be found in rich soil. The eggs of the flea bettle are 

 only 0.25 mm. in length and are thus found with some difficulty at the base of the 

 vines. Plants dug up about three weeks after the cages were charged with beetles, 

 were found to have the larvae at their roots. 



In the bulletin above mentioned, there is an error of omission which I take this 

 occasion to rectify. On the bottom of page 42 the following words should be added; 

 — "seed potato in the ground. In New York the larvae have been found boring in 

 the tubers, the wound made resulting in the formation of a". It may also be noted 

 that of all the species of Sciara mentioned on page 54 only S. paitciseta is North 

 American. 



O. A. JOHANNSEN 



Reviews 



An Abstract of the Legislation in Force in the British Empire Dealing 

 with Plant Pests and Diseases up to the Year 1920. By E. 



Marguerite Ralfs, Imperial Bureau of Entomology, London, 

 pages 1-65, 1921. 



This is an exceedingly useful compilation of the rules and regulations in relation 

 to plant pests and diseases and relates, as indicated by its title, to the entire British 

 Empire, including such widely separated parts of the world as Tasmania, Mauritius, 

 various political divisions of Africa, India and Canada and its provinces. The 

 restrictions and requirements are stated in non-technical language and some from 

 the American standpoint would be onerous, if applied to certain areas in the United 

 States, as for example the New South Wales requirement in relation to apple, pear 

 and quince to the effect that infected and fallen fruit must be collected and destroyed 

 regularly. The regulations apply to a large number of insects, plant diseases and 

 plants. The utility of the compilation is greatly increased by a detailed index. 



Entomologists will find much of interest in these regulations and those hand- 

 ling an extensive export business should certainly have a copy of this publication. 



E. P. F. 



Dr. Georgina Sweet, a thoroughly trained zoologist is in charge of the special 

 development along the lines of Economic Zoology, including Medical, Agricultural 

 and Veterinary Zoolog}^ recently inaugurated by the University of Melbourne. 

 The need of literature is at times very acute and she would greatly appreciate pub- 

 lications relating to the above mentioned lines and being placed upon the exchange 

 list of persons and institutions in a position to cooperate, though for the present she 

 can not hope to offer much in the way of exchange. It is a gracious act to assist 

 those remote from the great centers of scientific activity. 



