April, ’18] 
SCIENTIFIC NOTES 
269 
Molasses Sprays for the Control of Monarthropalpus buxi Labou . 1 On 
May 25, 1915, molasses sprays for the control of the boxwood midge were applied to 
a hedge in Baltimore at 6 p. m. Two strengths, one pound and four pounds to fifty 
gallons of water were used. Examination at 8 a. m. showed large numbers of the 
adults entrapped in the spray on the surface of the leaves. The greater number were 
caught in the spray containing four pounds of molasses. The sprays were applied 
too late to reach the maximum number of adults in flight as the maximum emergence 
occurs from May 10 to 15. It was planned to spray the entire hedge the following 
spring but during the winter the hedge was cut down and it was found impossible 
to continue the tests. The preliminary results are, therefore, offered in the hope that 
others may be able to test this control measure more extensively. 
E. N. Cory. 
Notes on a Spirea Leaf-roller. Olethreutes hemidesma Zeller is not generally 
recognized as being of any particular economic importance. Arthur Gibson (36th 
Rep. Ent. Soc. Ont. 119) has mentioned its abundance at Ottawa, Ontario, Canada, 
and J. J. Davis (Journ. Econ. Ent. 3-185) has reported its injury to Spirea Van 
Houtii in Illinois. These two records seem to be the only references in the economic 
literature. 
In July, 1916, these leaf-rollers were common on spirea at Ames and specimens 
brought to the insectary by Prof. J. E. Guthrie were at once placed in breeding cages. 
August 30, 1916, they were abundant and causing considerable injury to spirea in a 
nursery near Cedar Rapids, according to Ivan L. Ressler. In July, 1917, the insect 
was again common at Ames. Prof. B. M. Harrison reported the insects common on 
spirea at Shenandoah, Charles City, Washington and Cedar Rapids during the 
summer. The species appears to be common generally over Iowa. 
There are evidently two generations in Iowa. Larvse are recorded as abundant 
in July and again late in August and during September. They were most common 
in July. Davis says that two generations occur in Illinois. 
From insectary records taken in 1916 and 1917, moths emerged from July 22 to 
August 9, according to notes taken by H. R. Werner and Ivan L. Ressler. Only one 
moth was reared in the fall, emerging September 28; 5 to 8 days were spent as pupae 
in the summer, with an average of 5.8 days, from 17 records. In September, 8 days 
were spent as the pupa, but only one record is available. R. L. Webster. 
i 
The Agricultural Index. A cumulative index to agricultural periodicals and bulle¬ 
tins, cumulated quarterly, is a new undertaking in bibliography, indexing some 78 
journals. It is a reference work covering a wide range of topics and therefore most 
serviceable to the general worker though of much value to specialists because of its 
references along cognate lines. It is probable that experiment station libraries and 
many of the larger libraries of the country possess copies of the index and it is therefore 
presumably accessible to most economic entomologists. 
Contribution from the Entomological Laboratory, Md. Agr’l Exp. Sta. 
8 
