ARTICLE III.—BRIEF NOTES ON SORGHUM INSECTS. 
My last report contained a paper on such insects as infest the 
sorghum plant as were then known to me, and to these I now add 
a few notes on one of the species therein treated, together with a 
description of a second species occurring upon the roots, first 
observed this year. 
1. The Yellow Sorghum Plant Louse. 
(Chaitophorus flavus, Forbes.) 
Order Hemiptera. Family Aphidime. 
(Plate YI. Figs. 1-4.) 
This species, discovered last year, was first observed July 25, and 
the facts of its earlier life history were of course unknown, but our 
observations of the present season carry the record a month farther 
back. 
On the 2-th of June, in fields of sorghum at Champaign which 
had been replanted, when the plant was only three or four inches 
high and showed but three or four of the leaves, one of these was 
occasionally reddened with a small cluster of the above plant lice 
beneath it. Each of these consisted of a single full-grown female 
(winged in all cases but one) surrounded by a group of wingless 
young, sometimes evidently but just born. One of these winged 
females was dead in the center of a group of still living young. 
These fields were among those worst infested by this louse last year. 
I searched carefully and extensively for root lice, but in vain. 
Every stalk seen which showed any signs of ill condition was dug 
up and examined, but no root lice of any sort were found. It 
seems probable, consequently, that the Chaitophorus emerged from 
the ground in spring, crawled up to the lower leaves of the young 
plant, and there commenced at once to multiply; and it seems 
unlikely that any root form of this species will be found. Inis 
year, as last, I noticed that the qnts paid no attention to this plant 
louse, although Lcisius flavus and other species were not uncommon 
in the fields at the time. 
