1906] 
01 R A ULT—TRICJIOGRAMMA PRETIOSA RILEY 
145 
It crawled alioiit, not in the least disturhcd, and soon found the hosts. At exactly 
3:33, ovi])osition hcpui, or about one and one-half hours after birth. There were 
no indications to show that she was in any way conscious that the hosts were infer- 
tile. 
Table showing activity in regard to oviposition. 
Oviposifion from 
3:33-3:47 
3: 4S-3: 55 
4: 12-4: 27 
4: 35-4: 44 
5: 40-5: 42 
6:08:30-0: IS 
Totals. 50i minutes 
Resting periods 
3-47-3:48 
3:55-4: 12 
4:27-4:35 
4: 44-5: 40 
5:42-6:08:30 
6: 18-0: 35 
125i minutes. 
Number eggs depositei 
11 eggs. 
3 
3 
1 
20 eggs. 
b. Number of eggs deposited', number of depositions in single hosts. The 
actual number of eggs deposited by this female, as .shown above is twenty (20). Most 
of them were deposited during the first hour of the whole time during which the 
female was under observation, showing, or at least indicating, that by this time the 
insect was well tired out. This condition may ha\c been brought on by the difficulty 
in this case experienced in inserting the ovipositor: 
From 4:12-4:27 P. M., a period of activity as given in foregoing, the female, 
after depositing a single egg, made 17 futile attempts in succession to insert the ovi- 
positor in as many places in the same host. Each attempt occupied from 15-35 .sec- 
onds. Two successful depositions then occurred, followed by a period of 7 minutes 
rest, when another active period of 8 minutes ensued, during which, after depositing 
another egg, 3 more suceessive futile attempts to insert the ovipo.sitor were made, 
all on the .same ho.st. Two suceessful depositions were then made in a different host. 
' .\fter this oviposition became fitful, but three eggs being de])osited in the remaining 
two hours. 
The exaet cause of this inability to insert the ovipo.sitor eould not be aseertained 
from the nature of the ease, but it was probably eaused by weakness. The point of 
the ovipositor did not slip about during these attempts. 
Out of the thirty-four (34) host eggs, but ten ( 10) were parasitized by this female. 
Nine of these were noted with especial reference to the number of depositions made 
ill eaeh. In the first host, four eggs were deposited; in the 2nd, 3rd, and 4th, 3 eggs; 
in the ,5th, 1 egg; in the 6th, 2 eggs; and in the 7th, 8th, and 9th, 1 egg. The aver- 
age for each host is therefore about two (2). 
