SIXTH ANNUAL REPORT OF STATE ENTOMOLOGIST 



99 



IV. 



CAGE 4. 



Unfed larvae put in cage. 

 July 13— 30 

 July 16—30. 



Engorged larvae recovered. 

 July 18—2 

 July 20— 3 

 July 21— 

 July 22—0 

 July 23— 2 



w 



CAGE 5. 



Unfed larvae put in cage. 

 July 13— 30 

 July 17 — 450 (estimated.) 



Engorged larvae recovered. 

 July 20— 9 

 July 21—13 

 July 22— 1 

 July 23— 1 



Unfed larvae put in cage. 



Aug. 5 — 450 (estimated) 



VI. 



CAGE 6. 



Engorged larvae recovered. 

 Aug. 8— 3 

 Aug.. 9— 5 

 Aug. 10—54 



The larvae employed in the experiments recorded in table VI 

 were from the same general lot as those used in other cages but had 

 been kept longer after hatching. They remained unfed for about 

 thirty-two days and were very active when put on the guinea pig. 



Five engorged ticks not recorded in these tables were recovered 

 on July 17th from cages 2, 3, 4 and 5, in which unfed larvae had 

 been placed on July 13th. These apparently fed for four days. 

 Prom the tables above it is plainly indicated that the minimum feed- 

 ing period of this stage was from three to four days. A minority 

 dropped on the fifth, sixth and seventh days but as it had been ob- 

 served that somie of the ticks continued to wander about the cages 

 after the greater number had attached we were led to believe that 

 the last ones to drop had attached later than the others and probably 

 dropped after a similar period of feeding. 



The foregoing tables record the numbers of engorged ticks that 

 dropped day by day without regard to the time of day that they 

 dropped. We also kept a record of the numbers recovered in the 

 mornings and in the afternoons. The morning records were made 



