375 ~ 



In the second Harben lecture, Dr. Nuttall considers the spiro- 

 chetes, their disease production, and conveyance by ticks and bugs. 



In the third of the Harden lectures a general account is given 

 of the diseases produced by Piroplasma, their correlation with the 

 Ixodoidea, life cycle, etc. 



AUGUST FOREL. The Senses of Insects, translated by Macleod 

 Yearsley. (Methuen & Co., London, p. XV 324). 



The translator thus writes in the Preface. 



" The translation of Dr. Forel's, Senses of Insects, has been a 

 labour of love. His work is but little known in this country save 

 to a few physiologists, and to those entomologists who have turned 

 their attention to the physiology of insects. By them it is fully 

 appreciated. The work contains, however, so many interesting 

 experimental details, exhibits such a wide field of painstaking 

 investigation, such sound logic, and so liberal and open-minded 

 a treatment of the subject, that I feel sure it only requires trans- 

 lation to find a considerable audience in the United Kingdom. 



W. T. M. FORBES. On certain Pieris caterpillars. (Psyche, 16 

 (1909) no. 4, pp. 69-73, figs. 9). E. S. R. Vol. XXII. no. 4, 

 March, 1910 Washington. 



Breeding notes on Pieris daplidice, P. brassicce, and P. rapes are 

 given. 



W. E. COLLINGE. The role of Collembola in economic ento- 

 mology. (Jour. Econ. BioL, 4 (1909), n. 3, pp. 83-86, fig. i. 

 E. S. R. March, 1910 Washington. 



It is concluded that probably all Collembola "are [more or less 

 injurious to plant life. A list is given of 13 species which are 

 distinctly injurious. 



The Collembola (spring-tails) are a group of apterous insects, 

 all of small size. They have a forked tail bent under the abdomen 

 which enables them to proceed in a series of skips several spe- 

 cies feed upon vegetation and do considerable damage. 



F. BALFOUR-BROWNE. The Life History of the Agrionid Dragon 

 fly. -- (Proc. Zool. Soc., London, 1909, II. pp. 253-285, pis. 2. 

 chart, i); E. S. J?., March 1910, Washington. 



In these studies nymphs were first fed upon Paramceda which 

 they ate readily. As they grew the Paramceda were replaced by 



