100 



MONTANA EXPERIMENT STATION 



from eight to nine o'clock and those in the afternoon from half past 

 four to half past five. The records follow : 



Vll 



CAGE 



Date 



A.M. P.M. 



July 18 i 



July 19, 

 July 20. 

 July 21. 

 July 22 

 July 23. 



2 

 

 4 

 15 

 6 

 7 



Date 



VIII. 



CAGE 2. 



A.M. P.M. 



July 18 

 July 19 

 July 20 

 July 21 

 July 22 

 July 23 



IX 

 CAGE 2. 

 Date A.M. 



July 18.. TTT^ I 0~ 



Julv 19 1 



July 20 1 



July 21 1 9 



Jluy 22 1 2 



July 23 3 



X 



CAGE 4. 



P.M. Date 



~Tr~ July 18 



July 19 



12 July 20 



7G July' 21 '. 



25 July 22 



July 23 



A.M. P.M. 



XI. 

 CAGE 5. 



Date A.M. P.M. 



July 18 1 I 



July 19 1 I 



July 20 1 I 9 



July 21 1 7 I 6 



July 22 1 1 I 



July 23 1 I 1 



On July 20th, 2ist, and 22nd, as the engorged ticks were being 

 removed between eight and nine o'clock a. m., it was noticed that 

 by going through the cages a second time immediately we could 

 find engorged ticks that had just dropped and in such abundance that 

 we were led to think that a part or all of those recovered a few 

 uiinutes earlier had probably left the Guinea pigs within an hour o'- 

 so, or since daylight. Clearly, from the records as above given, the 

 engorged larvae preferred to drop during the daylight hours and 

 since our morning records were taken some three or four hours 

 after dawn, and since at about nine o'clock the ticks were known 

 to be dropping very fast, it is not unreasonable to conclude that by 

 far the majority dropped during the day. 



We hope to settle this question beyond all doubt next season 



