40 PARASITES OF GIPSY AND BROWN-TAIL MOTHS. : 
which he gave the name Tetrastichus canthomelene. In this very 
interesting article Dr. Marchal called attention to the fact that the 
elm leaf-beetle had multiplied for several years in a disastrous way 
about Paris, skeletonizing the leaves in the parks and along the ave- 
nues. In 1904 the ravages apparently stopped, and Marchal’s obser- 
vations indicated that this was largely due to the work of this ege 
parasite. He studied the life history of the parasite carefully during 
that year at Fontenay-aux-Roses and published his full account the 
following February. 
Visiting Dr. Marchal in June, 1905, after the publication of this inter- 
esting article, the senior author asked him whether he had been able 
to make the further observations promised in the article, and he re- 
plied that the elm leaf-beetle had so entirely disappeared in the vicin- 
ity of Paris that he had not been able to do so. The visitor urged him 
to make an effort through his correspondents to secure parasitized 
egos of the beetle for sending to the United States in an effort to intro- 
duce and establish this important parasite on this side of the Atlantic. 
It was considered hopeless to attempt the introduction that summer, 
as the time was so late and it was not then known in what part of 
France the elm leaf-beetle could be found abundantly. During 1906 
practically the same conditions existed. A locality was found, but 
the parasites did not seem to be present. In 1907, reaching Paris 
about the 1st of May, the visitor again reminded Dr. Marchal of his 
desire to import the parasite into the United States, and meeting M. 
Charles Debreuil, of Melun, the subject was again brought up and M. 
Debreuil later in the season forwarded eggs of the beetle to the United 
States, which were promptly sent to the parasite laboratory at North 
Saugus, Mass., but the time was too late, and the parasites had 
emerged and died. 
In April, 1908, the Entomological Society of France published in its 
bulletin (No.7, p. 86) a request from the senior author that eggs of the 
elm leaf-beetle should be sent to the United States for the purpose of 
rearing parasites. This notice brought a speedy and effective response. 
About the 20th of May Prof. Valery Mayet, of Montpellier, France, a 
personal friend, secured a number of leaves of the European elm car- 
rying egg masses of the beetle, placed them in a tight tin box, and 
mailed them to Washington. They were received May 28, and at 
once forwarded to the junior author at the parasite laboratory at 
Melrose Highlands. On opening the box the junior author found a 
considerable number of active adults of the parasite. Most of them 
were placed in a large jar containing leaves of elm upon which were 
newly deposited masses of the elm leaf-beetle eggs. Probable ovipo- 
sition was noticed within an hour after the receipt of the sending. 
There were probably somewhat more than 100 adults received in the 
shipment and very few emerged from the imported egg masses after 
