: New, YorK AGRICULTURAL EXPERIMENT STATION. 207 
that year’s brood had emerged from the larval channels. It’ 
was therefore too late to obtain beetles that summer to deter- 
mine the capacity for egg laying, and know with certainty that © 
-no eggs had been deposited. However, some observations were 
made upon beetles that had been captured in a poplar planta- 
tion, and it is thought that since the beetles continue to emerge 
for several weeks after the first appearance of the adults, at 
least some of the beetles had not begun to oviposit. 
The details of the observations are as follows: A pair of 
beetles while copulating were confined in a separate breeding 
cage, in which had been planted cuttings about an inch in 
diameter that had been made from the stem of a two or thre? 
year old nursery poplar to serve as food and for purposes of 
oviposition. After the beetles had fed upon and oviposited in 
the cuttings for several days, the punctures were dissected with 
the aid of a lens, the eggs not being counted until they were 
Seer: 
Observations were made on ten pairs of beetles lasting from 
Sept. 6 to Oct. 11. The examinations for the eggs in the bark 
were made at irregular intervals. ‘The egg laying record of the 
insects is as follows: 
TasLe I]— NumeBer or Eccs DeposiTep By FEMALE, C. lapathi. 




Sept.| Sept.| Sept.| Sept.| Sept.| Sept.| Sept.| Sent.| Sent.) Sert.| Oct. 4 
INSECTS. buy thee vg al ga) 1 pe | 48.9) aie} oe oan yt Pete. 
5 DE Seat ae i 2S a Mi a 2 3 5 Al iia. 3 6 PACA Yeo 25 
15) 0) SR ogee ORs IA en ee 2 pias Soe 1 i uv hod pA SW Ce Siok FL 14 
rr ee fete" Leet a 1 2 ees A ae 8 MUU ARE | Gm Rta 20 
1S ah ee eee ee ee Oe les IL Penns bitty Een ie Suthincthaa 3 4 
ALL Dae 2) ere, 1 2 7 4 2 fal Rest oie i Fay es Ubud 27 
102 ee ag | PEER me We i pease 6S a58 kl omen 6 5 Shen ies 23 
Eee er nee Onl Ie Bee BL} Ge 0 a eae ga ae OH AES eas 2 UIA NEGIMA SA Ula Be 10 
Tee Mt eR eA et Mt os 1 2 5 1 2 3 RW UP eaten Sy 14 
AAO Wi oo ee he fed mt Thies 4 RN ee 2 15 
kes eas e.g OCH eee 1 eae Ae bse ei ee z CO Ag, tit AN Salat ki 4 1l 










The average number of eggs deposited by the ten females is 
16.3, and the greatest number deposited by one individual is 27. 
An effort was made in 1906 to repeat these observations, upon 
beetles that had emerged in breeding cages. Many beetles were 
secured from the wood of some badly infested poplars and wil- 
lows. A week or ten days after emerging some of the beetles 
began to copulate and a number of pairs were isolated. But for 
some unaccountable reason the beetles were short-lived and very 
few eggs were deposited. 
