SUPPLEMENT. 
I regret that 'the valuable papers on the Aphides of the United 
States,' by Prof. C. Y. Riley and Mr. J. Monell, published in Bulle¬ 
tin No. 1, Yol. Y. of the U. S. Geol. and Geog. Surv. Terr. 1879, 
did not reach me in time to incorporate the additions in my report in 
their proper connection. 
Although not yet printed the Mss. is required to be ready for pub¬ 
lication by January 1, of each year, and submitted, yet it usually 
happens that it is not printed for some months after it is submitted. 
Thanking the authors for an early copy, I will add in this supple¬ 
ment the descriptions of the new species, and such observations and 
criticisms, on their notes as I think are required. 
SlPIlONOPHORA ACHYRANTES. Monell. 
“Apterous females. Pale green, with a dark, irregular stripe on each 
side of the abdomen, in fully developed specimens occasionally with 
an additional short stripe near the basal part of the abdomen, extend¬ 
ing over several segments. 
Winged females; head, prothorax, and sometimes the upper seg¬ 
ments of the abdomen, brownish black; the upper part of the thorax 
with a narrow but conspicious, transverse yellow band; general color 
of the abdomen pale green, with irregular, broken, transverse, dark 
brown lines, three of these often becoming confluent, and pro¬ 
ducing a dark patch in the center of the abdomen, just above 
the honey-tubes. Honey-tubes long, cylindrical, slightly dusky 
at their apices. Style long, slender, slightly curved upwards, 
more or less dusky. Length of the antenme a little variable, as long 
as the body or slightly longer. Frontal tubercles approximate at 
Rase, and somewhat porreot. Wings hyaline; stigma rather narrow 
and linear; stigmal vein very short, and curved much as in the genus 
Callipterus. The forks of the third discoidal vein are especially vari¬ 
able, their length being in one case four times and in another one- 
lialf that portion of the third vein between the base of the lower 
branch and the base of the forks. In the normal specimens, these 
distances are sub-equal. Length 2.28 mm; to tip of wings 3.81 mm. 
On the under side of leaves of Achyrantes (Amarantaceae).” 
