THE GRAIN BUG. 



19 



DAILY ACTIVITY. 



In calm and fair weather the nymphs of CMorochroa sayi are 

 active and feeding (see Table Y) during the period from about 8 

 a. m.^ until the heat of the sun becomes oppressive an hour before 

 noon. Then they seek the shelter of some object and remain quiet 

 until the heat of the sun abates, resuming their activity and feeding 

 from about 2 p. m. until the atmosphere cools in the late afternoon. 

 During the night, and the cooler periods at the beginning and eiid 

 of each day, the nymphs remain inactive and generally seek some pro- 

 tected location. The same is true during periods of high winds or 

 rainy weather. 



Table V. — Daily activity and feeding habits of nymplis of Chlorochroa sayi, 



July 15, 1916. 



y 



Time. 



A. M. 



4 



4.30 



5 



5.30 



6 



6.30 



7 



7.30 



8 



8.30 



9 



9.30 

 10 



10.30 

 11 

 11.30 



M. 

 12 



P. M. 

 12.30 



1 



1.30 



2 



2.30 



3 



3.30 



4 



4.30 



5 



5.30 



6 



G.30 



7 



7.30 



Temper- 

 ature. 



" F. 

 63 

 62 

 62 

 64 

 69 

 69 

 72 

 73 

 74 

 76 

 78 

 80 

 82 

 83 



Weather. 



Observation. 



\cioudy. 



Sunrise, 

 jcioudy. 



Partly cloudy. 

 Icioudy 



Fair. 



Partly cloudy, 

 jcioudy 



'Quite cloudy. 



Less cloudy. 



Quite cloudy. 



Resting. 



'Feeding. 



.Resting. 



Feeding. 



Resting. 



In discussing the feeding and activity of the nymphs, it should 

 be understood that in the high altitudes of northeastern New Mexico 

 the nights are very cool, even during the summer months, while high 

 temperatures are recorded at midday. 



,The inactivity of the nymphs during certain periods, together with 

 their habit of dropping to the ground and feigning death when ap- 

 proached, frequently leads many unobserving owners of damaged 



^ All references to clock time refer to " Standard time." 



