412 



W. D. FUNKHOUSER 



It is not likely that excessively wet weather would greatly affect the 

 eggs if temperature conditions were not adverse. The fact that the eggs 

 are usually laid high up on the plants in buds and steins, where water 

 would not remain, would preclude the possibility of their being drowned 

 or injured by soaking. 



Variations in temperature seem to have a lilve effect on the hatching 

 of the eggs and the development of the nymphs. For data showing 

 this variation the years 1914 and 1915 have been chosen as showing the 

 widest extremes of temperature. The spring of 1914, besides being 

 a season of much rainfall as already noted, was also warmer than usual; 

 the same spring months of 1915, on the other hand, and in fact the entire 

 summer of that year, were cold and disagreeable. The Weather Bureau 

 reports show the following records for the months of May, June, July, 

 and August, of 1914 and 1915: 



Average Monthly Te:jp3ratures 



The first records for these seasons, of nymphs and adults for a number 

 of species, have been tabulated as follows: 



Species 



Enchenopa binotata . . . . 



Ceresa diceros 



Ceresa biibalus 



Thelia biinaculata 



Telamona ampelopsidis 

 Telamona unicolor . . . . 



Cyrtolobus vau 



Atymnacastaneae 



Ophiderma pubescens . . 



Vanduzea arquata 



Entylia bactriana 



1914 



1915 



