INJURIOUS INSECTS OF [909 AND I9QIO. 127 
6. Potatoes sprayed with Paris green, 3 pounds to 50 gallons. Same results 
as No. 5. 
7. Potatoes sprayed when dry with Paris green 1 ounce, flour 20 ounces. 
Killed the beetles and larvae. 
Comparative experiments were carried on also, by Mr. Urbahns, 
with arsenate of lead and Paris green. Good results were secured 
with arsenate of lead, 3 pounds to 25 gallons of water; and also with 
Paris green, I pound to 25 gallons of water. The comparative re- 
sults were slightly in favor of the Paris green spray. 
A poisoned bran-mash was used with success against  cut- 
worms. To two pecks of dry bran, enough Parish green was 
added to impart a decidedly green color to the mass. Then enough 
water was added to make it of the consistency of chicken dough. 
Then enough black molasses was added to sweeten it and give it 
a decided odor. Any syrup might have done as well, possibly. This 
poisoned dough was scattered about in small masses amongst the 
plants in the experimental garden. 
Preliminary Work with White Grubs. 
Lachnosterna adults, removed from sod in 
insectary, garden on May 2oth, and placed in 
a breeding-cage under out-of-door tempera- 
tures, were first active on April rith. Fed 
freely on plum-leaves. Three hundred and 
fifty of these adults were placed in cages con- 
taining soil. They were active on warm 
nights between April 11th and June Ist. 
Thirty adults of Lachnosterna, remaining ™%,73%-, Bees oF noe. 
alive on, June Ist, produced 106 eggs. See 74 Urbanns. 
Fig. 7372. 
May sth, thirty adults captured in a lantern trap—most of them 
died. Thirty-five eggs had been deposited in the soil June Ist. 
These came from those of the captured beetles which survived after 
being placed in breeding-cage. 
June 10, twenty-six adults taken in lantern-trap during night. 
Some of these were observed mating. 
June 11, fifty-three adults taken in lantern-trap. These de- 
posited a few eggs. 
