96 
The species responsible for this condition of affairs properly belongs 
to the old genus Siphonophora, but as this name is preoccupied in the 
Myriapoda, and is also used to denote an order of oceanic Hydrozoa, I 
think it eminently proper for us to recognize Mr. Oestland’s name, 
Nectarophora, for this genus. Specimens of the insects were submitted, 
through Dr. Howard, to the well-known authority on the Aphid, Mr. 
Theodore Pergande, who considers it an undescribed species. Inasmuch 
as Mr. Pergande does not care to describe it, it is my privilege to name 
the insect, and | propose to call it Nectarophora destructor, reserving 
the description for another publication. 
The insects attack the young vines, clustering usually at first under 
and within the terminais. When the ieaves become overstocked the 
lice cluster upon the stems, quickly sapping the life out of them. It 
was not an uncommon sight to see a vine literally covered with the lice; 
indeed, whole fields of a hundred acres, as noted above. 
We have found the same species on sweet peas, and have kept it for 
some time upon clover. In my opinion some common plant is its natural 
food, but as yet I have been unable to detect it. 
There is little opportenity for work upon this insect from the experi- 
mental standpoint, as it is practically impossible to spray a field of peas 
when they are growing for commercial purposes. They are drilled in 
like wheat and completely cover the ground. We have shown, how- 
ever, that kerosene and water can be used to good advantage upon 
small patches. We used kerosene from 15 to 30 per cent solution in the 
Deming sprayer without injuring the vines. It is not desirable to use 
a stronger solution than 15 per cent, but the vines will not be injured 
by the stronger solutions. 
The latter part of June we used whale-oil soap very successfully upon 
late peas, at the rate of 1 pound of Good’s potash-lye soap in 4 to 5 
gallons of water. One of our large growers used tobacco dust, sowing 
it broadcast, when the dew was on, over the vines. It was very satis- 
factory, but hardly warranted the expense and trouble. It is exceed- 
ingly difficult to reach these insects with either a spray or dust. With 
our present knowledge of the creature, we must depend largely upon 
natural agencies for assistance. Recognizing the great importance of 
nature’s resources for checking the multiplication of certain species, I 
paid particular attention to these insects and diseases that destroy 
plant lice. Even at the time of my first investigation on Mr. Pearson’s 
place (May 24-26) there were enough syrphus-fly larve present among 
the lice for me to predict the destruction of most of the lice by them, 
if weather conditions did not intervene to bring about that desired 
condition, before the end of the season. 
I have observed three important groups of insects feeding upon the 
pea louse; first, and most important, the syrphus flies; second, the 
lady beetles; and third, the lace-winged flies. While all of these were 
found in every field examined, it was interesting to note the predomi- 
