IOWA ACADEMY OF SCIENCES. 
81 
On September 22d a root louse, of a decided ochre yellow 
color, esiDecially in the wingless and pupal forms, was found on 
roots of “Beard Grass” or “Blue Joint” (Androjxjgonfurcatus, 
MuhL), and “ Cord Grass ” or “Bull Grass” {Spartina cynosu- 
roides, Willd.). A few winged forms were also found. These 
agreed more closely with those found on Cornus at the time 
than any previous root forms taken from grass. A similar root 
louse was found September 25th on roots of “Drop Seed” 
[Mahleiibergia racemosa, Michx.). Specimens of these perennial 
grasses, with root lice and cnit colonies, were transplanted to 
pots and kept in the laboratory. At the same time, specimens 
of the same grasses were covered in the field with traps, the 
same as the annual grasses. From those covered out of doors 
and also those transplanted, winged forms issued and rested in 
large numbers on the sides of the traps. In color markings and. 
structural characters these agreed with Scidzoneiira corni. . A 
plant of Dogwood {Cornus sericea, L.) had been covered with 
bunting early in the fall. To this, numbers of these winged 
forms were transferred, where they willingly deposited their 
brood of wingless males and females. 
In examining the roots of the annual grasses, in one or two 
instances wingless lice were found, of a yellow color, but not of 
such marked character as those on the perennial grasses. On 
September 25th a few winged specimens were found on roots of 
Pigeon grass {Setaria glauca, Beauv.), one of which, from the 
wing characters, appeared to be a typical Schizoneura corni, but 
the ends of its wings had been gnawed off. The natural suppo- 
sition was that the ants had captured it and made it a prisoner, 
or had transferred it from a perennial grass. The other speci- 
mens, taken at the same time, resembled the forms already men- 
tioned as taken on this grass in July, except that the wing 
venaJion was very variable, as shown in figs. 7 and 7^. These 
w^ere also transferred to Dogwood, where they perished. 
At the time the winged Schizoneura were found on “Drop 
Seed ” a wingless form of a dirty white color was found with 
them, resembling the wingless form on Foxtail. These latter 
forms could be found on roots of Panic grasses {Panicum crus- 
gcdli and sangumale) and MuJdenloergia raceniosa as late as 
November lOth. No eggs had been found so far on the roots of 
any of these grasses, that is, attached to the roots. In 1889 the 
eggs were observed in the earth in breeding jar. 
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