98 
b. Not forming a gall. 
The Maple Bark-Louse. 
( Pulvinaria innumcrahilis, Rathvon.) 
Order Hemiptera. Family Coccm®. 
[Plate X, Fig. 4.1 
No member of the family of bark-lice (Coccidse) has yet been re¬ 
ported from the strawberry, and I was consequently much interested 
bv the discovery, on the 26th of last September, of well developed 
examples of the family occurring abundantly upon leaves of escaped 
strawberry plants, near Normal. In some places these were so 
numerous that every leaf bore from one to five or six; and very few 
roadside strawberries about the town were free from j^m. I 
were usually attached upon the upper surface of the leaf although 
an occasional individual occurred beneath. On examination, these 
pioved to be examples of the above well-known soft-maple bark-louse 
which had made their way from the adjacent maple trees to the 
leaves of the strawberry. The latter had 
dnrincr the summer, and it is therefore probable that 11 the maple 
trees had* bemr vigorously attacked by bark-lice, the strawberry 
plants near them would likewise have suffered m the same ratio 
Curiously nearly all the specimens upon the strawberry leaves TOJ 
males, while upon the maple leaves above them males were ex¬ 
tremely rare. An occasional female was seen upon the strawbeny, 
however living in the larval stage with beak inserted, and appar¬ 
ently thriving as well as her mates upon the foliage of the maple 
above Many of the males were pup®, others were imagos upon 
the point of Emerging; and empty shields from beneath winch th 
insect had escaped were not uncommon. The lea\es of the maples 
had scarcely begun to fall as yet, and there was every indication in 
the appearance of the bark-lice, and in the conditions present, that 
they P had fixed themselves upon the strawberry when young, 
and had developed there without difficulty, feeding upon the juices 
of that plant.* 
The Strawberry Plant-Lice. 
Siphonophora frag aria, Koch. 
Siphonophora minor, n. s. 
Aphis, sp. 
Order Hemiptera. Family ApHimmE. 
I have never learned of any serious damage to strawberries ffi 
Illinois inflicted by plant-lice, although certainly two, an f lp rob aMJ 
three, species infest that plant within our limits. Howevei,, UK 
appearance of plant-lice upon any kind of vegetation of e “°“ 
value, is never a matter of indifference, since the enormous lepi 
ductive power of these insects renders them always a source 
danger. ___:_— 
* Another maple coceid, of a species undescribed, also appeared upon the strawberr 
here. 
