20 



BULLETIN 1243, U. S. DEPARTMENT OF AGRICULTURE. 



Table 6. — Data on colonies of Mexican hean beetles in hibernation, winter of 



1921-22. 



GROUP 1. 



[149 beetles in original colony, marked red, November 22, 1921.] 





Date. 



Number of 

 painted 

 beetles. 



Number of 



unpainted 



beetles. 



Dead beetles. 





Painted. 



Unpainted. 



Nov. 30 



1921. 





24 











47 



y intruders 







Dec. 15 



Destroyed I 













GROUP 2. 

 [299 beetles in original colony, marked black, November 18, 1921. 



Nov. 30. 

 Dec. 9... 

 Dec. 15.. 



Jan. 3 !. 

 Jan. 17. 

 Jan. 22. 

 Feb. 17. 

 Feb. 24. 

 Mar. 8.. 

 Mar. 18. 

 Mar. 29. 

 Apr. 13. 

 Apr. 26. 

 May 10. . 



1921. 



1922. 



200 

 161 



156 

 156 

 116 

 93 

 85 

 65 

 54 

 40 

 25 

 10 

 



30 

 103 



168 



170 



166 



141 



115 



110 



85 



54 



38 



18 



8 







GROUP 3. 

 [80 beetles in original colony, marked purple, December 10, 1921.] 



1921, 

 Dec. 15 



1922, 



Jan. 3 



Jan.17 



Jan. 31 



Feb. 18 



Feb. 23 



Mar.6 



Mar. 18 



Mar. 27 



Jan. 6 



Feb. 23 



Apr.13 



Apr. 26 



May 10 





 1 

 1 

 1 

 1 

 1 

 1 

 

 more 



Beetles noted with snow on ground 



closely grouped. 

 Temperature moderating and beetles scattered 

 generally through covering. 



GROUP 4. 

 [65 beetles in original colony, marked white on left wing cover, December 10, 1921.] 



1921. 



43 



40 



35 



29 



26 



22 



20 



20 



13 



9 



3 







12 



10 

 16 

 8 

 11 

 13 

 5 

 3 

 5 

 4 

 1 

 1 







1922. 



1 

 

 

 

 

 



1 











1 









Jan. 17 





Jan. 31 



2 



Feb. 18 



o 



Feb. 23 







Mar.6 





Mar.18 







Mar. 27 







Apr.13 







Apr. 26 







May 10 











Majority of beetles found in space 18 inches square. 



