plate. An indistinct row of short transverse lines in the sutures ex- 
tends back from the hind coxe on each side. Exterior to these is a 
row of light brownish spots including the pale spiracles. The spot on 
the first segment combines with the marginal blotch. In the blotches, 
on the first and seventh segments, and just below those on the second, 
third, and fourth segments, are large circular excretory pores similar 
to those on the thorax, outlined by a fine darker line. 
Length 1.8 mm., breadth .8 mm., antenna .63 mm., fore wing 1.8 
mm. 
Described from five specimens, three taken on grass roots, one on 
corn root, and one resting on corn leaf. 
Schizoneura panicola, Thomas, is nearly related in habit and strue- 
ture to the European S. venusta, of Passerini, but differs from that spe- 
cies, according to Passerini’s very brief description, in the color of the 
head and abdominal fascia, which are light dusky instead of black. 8S. 
panicola differs also from S. venusta in the absence of the discoidal 
patch on the abdomen, and in the longer beak—reaching the hind coxe, 
while that of venusta is said to extend only to the middle coxe. The 
latter species is given by Passerini as occurring in Europe in autumn 
on the roots of Setaria viridis, S. glauca, S. italica, Panicum glabrum, 
Eragrostis megastachya, and Ceratochloa australis; also in the month 
of June on the roots of wheat (“Aphididee Italice,” p. 69). ; 
Trama erigeronensis, Thos. 
(Plate IX., Fig. 2.) 
This root louse is included here because it has been found a few. 
times in corn fields under circumstances to indicate its probable occur- 
rence on the roots of corn itself. It is not strictly a corn insect, how- 
ever, so far as we now know. 
We have at hand specimens of the wingless viviparous female that 
have been taken as follows: March 19, (situation not given); April 1, 
from an ant hill (Lasiws mixtus), on grass and a dicotyledonous weed ; 
April 5, under a log at edge of corn field attended by Lasius mger; 
April 8, at roots of old corn; April 9, from an ants’ nest; April 11, 
from roots of blue-grass, attended by Lasius interjectus; April 23, from 
nests of Lasius; April 26, in Lasius nest in old log; May 7, taken in 
corn field; November 25, from roots of Panicum, in corn field, with 
ants. Thus we see that this species has been collected here once in 
March, seven times in April, once in May, and once in November. 
Specific determinations have been made of the following species of 
ants attending this root louse; Lasius niger, L. miatus, and L. inter- 
jectus. It is attended by about the same species of ants as the other 
root lice treated in this publication, and the range of food plants as 
shown above is also about the same as those given for several other 
species. 
DESCRIPTION.* 
Having a large series of this perplexing species, which is quite evi- 
dently the same as that described by Dr. Thomas in the Eighth Report 
* oD yo Gut ACE ace. 
