Vol. XXv] ENTOMOLOGICAL NEWS. 281 



EGG NEST H. 



Temperature at start 68 deg. F. 



Temperature at end of 5 minutes 1 16 deg. F. 



Temperature at end of 10 minutes 130 deg. F. 



Water temperature at start 168 deg. F. 



Water temperature at end of 10 minutes 130 deg. F. 



EGG NEST I. 



Temperature at start 75 deg. F. 



Temperature at end of 5 minutes 62 deg. F. 



Temperature at end of 10 minutes 59 deg. F. 



\\ ater temperature at start 55 deg. F. 



Water temperature at end of 10 minutes 59 deg. F. 



EGG NEST J. 



Temperature at start 74 deg. F. 



Temperature at end of 5 minutes 68 deg. F. 



Temperature at end of 10 minutes 63 deg. F. 



Water temperature at start 54 deg. F. 



W'ater temperature at end of 10 minutes 56 deg. F. 





 In water the temperature rose 46 deg. F. and 62 deg. F. in 



10 minutes, and in air 96 deg. F. in 12 minutes. In water the 

 temperature fell 16 deg. F and n deg. F. in 10 minutes and 

 in air 26 deg. F. in 15 minutes. 



Even though conditions were imperfect, the tables show 

 that the eggs are not subjected to sudden changes of tem- 

 perature. Nests which were entirely immersed in water for 

 1 24 hours, showed interiors perfectly dry. At the end of two 

 hours, however, the porous rind became somewhat moist, but 

 the water had not reached the core. 



This porous rind, in practically all nests, varied from two 

 to seven millimeters in width, with an average of 5.6 mm. 



Fifteen nests, cut transversely in half, showed the follow- 

 ing measurements. 



Width of Core. Width of rind on each side. 



12 mm 7 mm 



ii " 6 " 



13 " 6 " 



12 7 



13 " 7 



M " 6 



