REVISION OF NEARCTIC TERMITES. 171 



sand and the insects could be observed through the bottom of the jar. 

 This colony consisted of workers, soldiers, and nymphs (young). 

 On November 22, 1915, three females and two males — second form 

 reproductive types — ^were present in this colony; these forms had 

 probably developed since the colony was removed. The females had 

 markedly distended abdomens and the males slightly distended abdo- 

 mens. Both sexes had greyish-brovTi or straw-colored pigmentation 

 to the chitinized parts. The reproductive forms usually inhabited 

 cells in the sand at the bottom of the jar, where they were easily 

 observed (fig. 70). When there were unfavorable conditions of 

 temperature or moisture they retreated into the wood. On March 

 13, 1916, a cluster of about 1 dozen eggs was observed. 



Some data on the rate of egg laying of these three reproductive 

 females of the second form in an artificial colony indoors is at hand ; 

 the following notes on this colony have been greatly condensed: 



April 27, 1916. Numerous eggs in cluster. 



May 10. 1 large and 1 small cluster of eggs. 



May 31. A large number of eggs. 



June 28. Numerous eggs and recently hatched young. 



July 20. Eggs and young. 



August 16. Numerous eggs. 



August 23. Recently hatched young and eggs. 



August 29. Recently hatched young and eggs, both numerous. 



September 6. Eggs and young. 



September 22. Eggs and young. 



October 20. Few eggs and young. 



November 14. Recently hatched young. 



December 4. Small cluster of eggs. 



December 9. Young. 



December 12. 2 clusters of eggs. 



December 20. A cluster of eggs half the size of a pea. 



December 27. Young, few eggs. 



December 28. Numerous eggs. 



January 3, 1917. Eggs. 



January 5. Numerous eggs. 



January 9. Recently hatched young, several dozen eggs. 



January 16. 3 clusters of eggs the size of peas and recently hatched young. 



January 18. Large cluster of eggs and recently hatched young. 



January 25. Two large and one small cluster eggs, also young. 



January 29. Recently hatched young, large cluster eggs size three peas. 



Febuary 3. Fewer eggs. 



February 8. Large cluster of eggs and recently hatched young. 



February 10. Recently hatched young. 



February 21. Eggs and young. 



March 2. Eggs and young; 2 clusters of eggs size of peas. 



March 6. Small clusters of eggs. 



August 14. Cluster of eggs. 



September 12. Young. 



October 10. Eggs and recently hatched young. 



November 1. Recently hatched young. 



December 7. Eggs. 



December 24. Recently hatched young and eggs. 



