DEVELOPMENT ANT) IMMATURE STAGER. 141 



1901. 



June 16. Tlie second has emerged, both are now second nymphs ; 



there is considerable difference in size. 

 24. The larger one is nearly inert. 

 28. The larger one is quite inert. 

 30. The larger one has emerged and is an adult $ . 

 July 6. The smaller has emerged, is an adult < ; the two are in 



copo. 



8. There is an egg in the cell. 

 10. There are five eggs in the cell. 

 13. There are nine eggs in the cell. 

 17. Some of the eggs have hatched. 



Cell S. 8. 



1901. 



April 28. Put an inert first nymph into this cell. 



May 4. It has emerged and is a second nymph. (It continued 



lively until May 26th inclusive.) 

 27. It is inert. 



30. It has emerged, is an adult $ , cast skin is there. 

 June 1. Put an adult lately emerged (J into the cell. 

 5. Saw the two in copo. 

 6. Took out the <. 

 7. There are three eggs in the cell. 

 9. There are four eggs in the cell. 

 11. There are nine eggs in the cell. 

 13. There are eleven eggs in the cell. 

 16. There are thirteen eggs in the cell. 

 18. There are fourteen eggs in the cell. 

 20. Two larvae have emerged. 

 26. Several larvae have emerged. 

 30. Two larvae are inert, put them in cell S. 19. 

 July 2. Several other larvae have emerged. 



4. Two nymphs have emerged ; put them in cell S. 16. 

 6. There are more nymphs. 

 13. One nymph in cell S. 16 is nearly inert. 

 15. Is inert. One of the nymphs in cell S. 19 is also inert. 

 17. The inert nymph in cell S. 16 has emerged, and is now a 

 second nymph. Eggs still continue to be laid in cell 

 S. 8. 



19. The inert nymph in cell 19 has emerged and is now a 

 second nymph ; the cast skin is there. 



Cell S. 9. 



1901. 



April 30. Put three first nymphs, bred from larvae in cell S. 7, into 

 this cell. (They remained lively until May 21st inclu- 

 sive.) 



May 22. One has become inert. 



26. It has emerged and is a second nymph. Have removed 

 the remaining first nymph into another cell. The second 

 nymph remained lively until June 4th inclusive. 



June 5. Is sluggish. 



