312 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
latter species entered a moving automobile, alighted inside the top, and 
remaining there, became so abundant as to almost cover it. 
Enemies 
Two species of dipterous parasites of horseflies have been obtained 
and determined by Dr. J. M. Aldrich. These are represented by one 
specimen of Phasicps flava Coq. (Family Dexiidae) and tw r o specimens of 
Anthrax lateralis Say (Family. Bombyliidae). Neither species appears 
to have been heretofore recorded as a parasite of tabanids. The adult of 
Phasiops flava issued from the remains of a larva of what was apparently 
Tabanus trimaculatus . This larva was taken in the field while still 
alive and the parasite later pupated within the skin of its host. 
The adults of Anthrax lateralis came indirectly from larvae that be¬ 
longed, without much doubt, to Tabanus annulatus . These two larvae 
pupated and from each pupa a bombyliid pupa later freed itself, the 
fly issuing soon afterwards. 
A CONTROL FOR JAPANESE BEETLE LARVAE IN GOLF GREENS 
By B. R. Leach, Entomologist, U. S. Department of Agriculture 
and J. W. Thomson, Investigator, Department of Agriculture, State of New Jersey 
Abstract 
The larvae of the Japanese beetle {Popillia japonica Newm.) has become a serious 
pest in golf greens. As many as 300 larvae are found per square yard of turf. 
Sodium cyanid in solution kills the larvae but completely kills the grass. Emulsi¬ 
fied carbon disulfide, when properly applied, controlled the larvae with no injury 
to the turf, in fact the material is a decided stimulant to the grass, the action being 
somewhat similar to an application of sodium nitrate. 
The larva of the Japanese beetle (. Popillia japonica Newm.) has be¬ 
come a serious pest in golf greens. The rich soil and heavy turf of the 
greens attracts the beetles, and eggs are deposited in enormous numbers 
during June, July and August. Under these circumstances it is not 
unusual subsequently to find as many as 300 larvae to the square yard 
of turf. The larvae feed upon the grass roots and by late August or 
early September the turf begins to turn brown and the green is largely 
ruined from the standpoint of the game of golf. Unless the green is 
worked up and reseeded, it is overrun during the following spring by 
weeds and coarse grasses. 
Considerable experimental work was done at the Japanese beetle labor¬ 
atory by J. J. Davis 1 using a solution of sodium cyanide in water as a 
1 Davis, J. J. “Miscellaneous Soil Insecticides Tests" in “Soil Science," Vol. X, 
No. 1, July 1920, page 61. 
