192 DISEASES OF THE COTTON PLANT. 
the antennse are brown and green, the eyes brown ; the 
thorax somewhat triangular ; the anterior part green and 
shaded with reddish brown posteriorly ; the legs, brown 
and green ; the wing-cases with a cross, shaped like the 
letter X, forming four triangles, those nearer the thorax be- 
ing reddish brown ; the side triangles are green. 
I observed these insects, when confined under glass, 
sucking the sap from the buds and young bolls, their only 
food. The young eventually completed their transforma- 
tions into perfect insects. They were observed, moreover, 
to eject large drops of green sap from their abdomens, 
which could only have been procured from the buds them- 
selves. As it has been already seen that these insects 
puncture the bolls and extract the juices therefrom, the 
question arises whether they do any material injury, either 
by this extraction of the sap, or by a poisonous sting, like 
some of the Reduvii. 
There is likewise another of the same species of insect, 
which was found perforating the yoijng flower-buds and 
bolls of the cotton, similar to the above. The head and 
anterior portion of the thorax are reddish brown, the re- 
mainder of the thorax yellow, with a double dark mark in 
the middle ; the wing-cases are brownish black, with two 
longitudinal lines from the upper outside corner of the 
wing-cases to the posterior edge, forming a dividing mark 
somewhat shaped like the letter X. 
The Centrinus Perscillus. 
This insect is about three-twentieths of an inch in 
length, of a grayish color, with a rather long, curved ros- 
trum, or bill ; was found in the terminal shoots, as well as 
in the blossom ; but I could not perceive that in any way 
it injured the plant. I have also seen very young boll- 
