a’ ' fem: ae eS ee “ es es « 
May 31, vorn roots, sod ground; Lasius; pupa, showing wing-pede “a 
“. “31, an sod} Lasius niger. ao 
Ly 
“ 31, on blue-grass roots; in Lasius nest ; pupe. 
1, young corn roots and base of stalk, sod ground, one fourth the 
corn infested, 
1, corn roots, sod ground. 
5, breeding cage; winged female from pupe of Mar. 31. 
“ 6, corn roots, abundant, sod ground; Solenopsts debilis. 
* 13, corn roots, sod ground, 
July 14, clover roots. 
15, on roots of corn, “at 
28, on roots of corn. ‘ 
Aug. 11, on roots of clover (twice). 
Sept. 25, on roots of Panicum crus-galli; Lasius. 
Oct. 15, timothy roots; oviparous female. 
20, corn roots. 
“28, timothy roots; male and viviparous female. 
“29, in meadow ; Lasius niger; oviparous female, 
Nov. 19, blue-grass and timothy in corn field; oviparous and viviparous — 
females and young. 
“24, corn field; burrows of Lasius. 
* 24, about roots of corn; oviparous female. 
We see from the above list that this species has been found on the 
roots of the following plants: ~ $3 
Corn (seventeen times), Apr. 6, May 19, 22 (three uimes) 24, 28, 
29, 31, June 1 (twice), 6, 13, July 15, 28, Oct. 20, Nov. 24. Also in Ss 
corn hill of previous year (twice), Mar. 21 and 23. 
Oats, May 9. 
Timothy (five times), Jan. 20, May 8, Qet. 15, 28, Nov. 
Blue-grass (three times), Apr. 26, May 31, Nov. 19, 
Panic-grass (Panicum gpsovent Sept. 25. 
Grass (five times), Feb. 13, aur 1, 19, May 7, 25. 
“Sod” (six times), Mar: 9, 26, 29, May 19, 31, Oct. 29. 
Clover (three times), July 14, and Aug. 11 (twice). 
Shepherd’s purse (twice), at 4 and 10. 
A dicotyledonous weed, Apr. 1. 
Thus it is shown that of the forty- -seven sets of specimens of this 
species in the collections of the State Laboratory of Natural History — : 
eighteen were taken from the roots of cultivated plants, twenty-one — 
from roots of grasses, three from clover, three from weeds, and two or 
three from ants’ burrows but not on plants. a 
The fact that it has been found on corn much oftener than on _ 
other plants does not necessarily mean that it affects this plant to a | 
greater extent than others, as in our investigations corn has been ex- 
amined more frequently than the others mentioned, 
It must be noted that this species has been seen but once in a field 
that was not in grass the previous year; viz., May 9, on roots of oats in— 
old corn ground. 
Tt often oceurs in the formicaries of ants with other species of root — 
lice, mealy bugs (Dactylopius), and coceinellid larve. Collections were 
not always made of the ants in attendance, but a careful study of the 
tS 
