HABITS AND LIFE HfSTORY. 
43 
are regularly developed, with the possibility of a partial fifth genera- 
tion. On a number of potted trees a single overwintered female was 
left to each tree. After the full progeny of tin's individual had gone 
out over the tree, all were removed again, except one of the oldest and 
**'»• 
Fig. G. — Adult female, before development of eggs: a, ventral view, showing Aery long sucking 
seta'; b, anal plate, showing characteristic ornamentation of edge — greatly enlarged. (Original.) 
fertilized females. This method was continued for each generation 
throughout the breeding season. Some interesting records, tabulated 
below, were thus obtained, which indicate the fecundity of the females 
as well as the number of generations. 
Number of tree. 
Males. Females. Total 
ogen 
1 
y <>f overwintered 
females. 
72 
34 
IDC 
77 
43 
120 
138 
60 
198 
18 
<>•> 
40 
98 
60 
158 
:t3 
•J.") 
58 
13 
13 
I'roiiin 
/ of secono 
(tti(i)i. 
350 
235 
276 
'J'Jti 
325 
92 
192 
120 
415 
151 
206 
' 124 l 
585 
502 
417 
312 
556 
330 
Number of tree. 
Males. Females. Total. 
Hon. 
307 
4(14 
284 
400 
280 
•J 7 4 
of fourth 
tit ion. 
110 
1 22 
190 
187 
174 
107 
Progeny 
•J J -J 
319 
112 
230 
92 
170 
210 
344 
242 
343 
L56 
293 
417 
586 
474 
454 
gener~ 
561 
342 
262 
554 
449 
