93 
% 
An indistinct row of short transverse lines in the sutures ex¬ 
tends back from the hind cox* 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, out¬ 
lined 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 
structure to the European <8. venusta, of Passerini, but differs 
from that species, according to Passerini’s very brief description, 
in the color of the head and abdominal fasciae, which are light 
dusky instead of black. S. panicola differs also from S. venusta 
in the absence of the discoidal patch on the abdomen, and in the 
longer beak—reaching the hind coxae, while that of venusta is 
said to extend only to the middle coxae. 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 (“Aphididm Italicae,” p. 69). 
Tram a 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 occurrence on the roots of corn itself. It is not strictly 
a corn insect, however, 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 ( Lasius mixtus), on grass and a dicot¬ 
yledonous weed; April 5, under a log at edge of corn field at¬ 
tended by Lasius niger; 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. mixtus , and 
L. interjectus . 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. 
