Dorothy J. Jackson 103 



kept indoors and regularly fed, and no corroboration of such a prolonged 

 life has been obtained by field observation or outdoor experiments. 



ceased 



As a rule from two to five eggs are laid daily, but as many as twelve per 

 day have been observed. 



II. Length of the Egg Stage. 

 In order to determine the length of the egg stage, eggs laid between 

 certain dates were placed on damp earth in small dishes and the latter 

 kept in tins containing a layer of wet moss, the tins being kept out of 

 doors or in an unheated room. The result of these observations may be 

 tabulated as follows : 



Locality from which 



parent beetles 



were obtained Date of oviposition Date of hatching 



Bournemouth Sept. 17th to Oct. 8 A few larvae only on Oct. 12th. 



Invershin Sept. 22nd to Oct. 13 Oct. 31st to Nov. 2nd three 



larvae only. Feb. 16th to 

 April 25th, 42 larvae, the 

 majority hatching in March. 



Wye Oct. 13th to 16th Two larvae only on Nov. 18th. 



Sudbury Oct. 16th to 31st Mar. 27th to Apr. 12th. 



Evanton May 6th to 10th Commenced May 31st. 



III. Length of Larval and Pupal Stages. 

 The time occupied in the development of larvae resulting from eggs 

 laid at different times of the year has been ascertained by means of the 

 following breeding experiments, in which, except when otherwise stated, 

 the eggs were placed at the roots of clover growing in sleeved pots out 

 of doors. It w^as necessary to duplicate many of these experiments to 

 observe the habits and development of the larvae, owing to the dis- 

 turbance of the soil this involved. The length of the egg stage being 

 already known and the pupal stage lasting about four weeks the length 

 of the larval stage can be deduced when the imagines emerge by sub- 

 traction of these periods. 



1. Development of the Autumn-laid eggs. 



(a) The Autumn Hatching Larvae. 



Eggs laid September 17th to October 8th, 1919 produced a few newly- 

 hatched larvae on October 12th. Eggs and larvae placed in pot on 



