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In life history there is one decided difference: Longifilis is viviparous, 
while destructor is oviparous. Longifilis is larger but not nearly as 
prolific as destructor, and rarely becomes numerous enough to do much 
harm. The species is almost as general a feeder as destructor. 
On the 27th of April, while in the clover fields studying the clover 
root-borer, an occasional nest of Lasius niger was disturbed or dug into, 
and the little ants were noticed to be carrying away some oval, plump, 
mealy-covered, egg-like objects for a safer location. Some specimens 
of them were obtained and placed in a box with a few ants and later 
were examined in the laboratory. They were 1.5 mm long and l mm wide 
and to the unaided eye looked like oval eggs with a mealy cover- 
ing. When placed under the microscope, it revealed no head, but a 
set of almost transparent legs, antennae, and a short rostrum on the 
plump body close to the front legs. The legs were small, not capable 
of dragging the body any distance, but could move it a few millimeters 
at a time. The tarsal claw and 4 tarsal digitules were i>resent, though 
the latter were shorter than in the common mealybug. The antenna? 
were from G to 8 jointed according to the number of joints made in the 
terminal segment. The color was a reddish brown, which appeared 
much lighter because of the white covering. 
The specimens with the acts were placed by a potted clover plant 
and every few days were examined. On the 15th of May some of them 
had commenced giving birth to young. These young gathered under 
the mother bug, or else collected in the flocculent mass back of her 
that she had secreted while producing them. They were of a light 
translucent flesh color and much flatter than the mother. They had 
the same mealy covering in a short time after birth that she pos- 
sessed. The legs and antennae were dirty yellow and almost as large 
as those possessed by the adult. The antennae were 6-jointed, the'basal 
and terminal joints being the largest and longest; the others globular 
and subequal; eyes red. 
To put in as brief a form as possible a long and careful watching 
from that time on to the present, we will say that the young mealy 
bugs grew, and they have since been carried through two generations 
on the roots of the common red clover, Trifolium pratense. After about 
the 1st of June the mealybugs were found quite common on the clover 
roots in the vicinity of the Michigan Agricultural College wherever 
clover was found. They are more regular and even in development 
than destructor and the number of broods can be easily followed. They 
are nearly as prolific through the summer as destructor, though the 
winter interferes, as they do not breed through the cold weather and 
must start from the winter form in the spring. From 1 to 2 inches 
below the surface is about the usual depth on the root at which they 
will be found, but they often go 5 or 6 inches out on a lateral root that 
does not run too deep. They prefer cavities made in the roots by the 
clover root-borer, Hylastes trifolii, which is very common with us, but 
