]VIAY 22 1897 



The Constitution and Development of the Society 

 of Termites : Observations on their Habits ; 

 with Appendices on the Parasitic Protozoa 

 of Termitidae, and on the Embiidse. 



(Concluded from Vol. 39, p. 315.) 



By 



Professor B. Orassi in collaboration with Dr. A. Sandias.^ 



With Plates 16—20 in Vol. 39. 



The Mode of Development of the Castes in Termes and 



Calotermes. 



I. Development of the Substitute or Complementary 



Royal Forms. 



A. Experiments and Observations on Calotermes 

 under Natural Conditions. 



1. The royal pairs of about eighty nests were removed at 

 difiPerent times from January to July.^ After the following 

 October each nest was found to contain a substitute pair^ i.e. 



1 [By a misunderstanding, for whicli the translator is not accountable, the 

 paragraphs containing the observations of Dr. Sandias referred to on p. 253 

 were enclosed in Part I of this paper between square brackets. All such 

 paragraphs occurring in the text of that part should be credited to him ; in 

 the following pages they are distinguished by being placed between asterisks. 



On the other hand, all such footnotes of both parts, and such portions of 

 the text of the present instalment, as are contained in square brackets 

 have been added by the translator, some notes not contained in the original 

 having been supplied for this translation by Professor Grassi. — W. F. H. B.] 



' All these nests were left with a more or less numerous population of 

 soldiers, larvae of different ages, and nymphs. 



VOL. 40, PART 1. — NEW SER. A 



