April, '16] SANDERS AND FRACKER: LACHNOSTERNA RECORDS 



255 



per cent of the entire catch of over 110,000 beetles at Baraboo and 

 99.1 per cent of the 14,500 at Ripon were made at 66° and upward. 

 With higher temperatures, however, the volume of the'fiight did not 

 alwaj^s increase to a maximum at the highest degrees. Other weather 

 conditions, such as cloudiness or moonlight, appeared to have less 

 effect than is usually attributed to them. 





Fig. 11. Map of Wisconsin, showing trap-light stations 

 and intervening distances. Dotted line bounds area of 

 white grub damage. 



The following table is a typical record from Baraboo: 



Date Weather Conditions Temp. 8.00 p. m. No, Beetles 



May 14 Clear and calm 54° 



May 15 Clear and calm 57° 



May 16 Clear and calm 61° 135 



May 17 Clear and calm 64° 154 



May 18 Clear, light south wind 69° 1,250 



May 19 Clear, light south wind 70° 1,902 



May 20 Cloudy, hght south wmd 73° 3,156 



May 21 Clear and calm 62° 155 



May 26 Cloudy, warm south wind 80° 22,700 



