Host number. 
PSYCHE 
Time, P. M. 
[December 
Number depositions per egg. 
1. 
3:46 
1; 1; 1 (4:59); 1 (5:02). 
2. 
3:52:30. 
1; 1 (4:58); 1 (5: 10); 1 (5: 12). 
3. 
3:54-3:55:30. 
1; 1 (5:40). 
4. 
3:56:30 
1. 
5. 
3:58. 
1; 1. 
6. 
4: 00. 
1. 
7. 
4:05:30. 
1. 
8. 
4: 50-4: 54. 
1; 1. 
9. 
4: .57. 
1; 1; 1; 1; 1; 
10. 
5: 13. 
1; 1 (5:43). 
11. 
5: 17. 
1; 1- 
12. 
5: 20. 
1; 1 (6: 0.5); 1 (6: 10). 
13. 
5: 25-5: 27 
1; 1. 
14. 
6:20. 
1; 1. Final oKservatlon. 
On July first, twenty-two ( 22 ) parasites emerged from hosts exposed to a single 
female; she therefore deposited at least twenty-two (22) eggs. 
For other important observations on this, vide seq., 6. 
From the fact that these observations were made under artificial conditions, that 
is, that the host eggs were supplied gratuitously, the female not having to search for 
them as they occur in nature, it is rather difficult to base calculations upon them. 
However, the following calculation is based on several apparent facts, — that the 
average time for single depositions is two minutes; and that, after females had been 
laying eggs continuously for a half-hour they appeared to be more or less exhausted, 
and deposition occurred at intervals of time only thereafter, for the space of about 
two hours. Hence the period of oviposition appears to be at its height during the 
first half-hour after commencement, and continues wdth more or less persistency for 
about twm hours. 
Without going into details, the average number of eggs for two hours would be 
sixty (60) eggs; and for one-half hour, fifteen (15) eggs. This calculation agrees 
with conditions found in confinement. Two females in the time of two hours, para- 
sitized twenty-four (24) eggs, out of many supplied, averaging three depositions to a 
host. This would make thirty-six (36) eggs deposited by each. Repeated obser- 
vations seemingly confirm this, and indicate forty (40) eggs, or less, as the average 
number deposited. 
A calculation of the possible, but improbable and obviously absurd, maximum 
