94 
in “ Bulletin No. 2. State Laboratory National History ,” belongs to 
Myzus , while the species here described, is certainly a true Aphis in 
the restricted sense. 
Aphis apocyni. Koch. 
* I 
Although there may be some slight differences between the plant- 
lice found on Apocynum or dogsbane in this country and those found 
on the same genus of plants in Europe, yet these differences are so 
small and the points of agreement so marked that I am forced to con¬ 
sider the two as identical. As described and figured by Koch, the 
European insect is as follows : 
Winged specimens. —Antennse scarcely reaching to the base of the 
honey-tubes, body rather slender, form and appearance as well as color 
very similar to the winged specimens of Aphis mali or apple plant- 
louse. The three branch or discoidal veins of the fore wings very 
nearly straight; second fork of the third vein a little nearer the apex 
of the wing than it is to the third vein ; stigma long, rather slender, 
acutely pointed at the tip. Honey-tubes rather short, not quite reach¬ 
ing the tip of the abdomen; tail distinct about half the length of the 
honey-tubes. 
Antennse more or less dusky ; eyes brown ; head and thorax black ; 
abdomen grass-green, with some fuscous shadings in front of the 
honey-tubes and some darker transverse stripes behind them ; honey 
tubes black, tail dark green; wings transparent, with brown veins ; 
legs pale yellowish except the tips of the femora and of the tibiae, 
and the tarsi which are dusky. 
Wingless individuals ,—Regularly ovate, and much broader than the 
winged ones, antennae shorter, general color dark green which prevails 
over the body except the head, two transverse thoracic lines, and two 
or three transverse lines near the tip of the abdomen, which are 
black; honey-tubes and tail black. Length of body about .10. inch. 
The specimens which I have examined, which were found by Dr. 
Bundy at Sauk City, Wisconsin, on dogsbane ( Apocynum cinnabinum ), 
present the following characters, as shown by the alcholic specimens 
and notes of Dr. Bundy. 
Winged specimens. —Wings transparent, veins small, the branch 
veins usually straight, the first and second without a bend or curve; 
second fork of the third vein nearer the tip of the wing than it is 
to the third vein; stigma rather long and sharp pointed. Honey- 
tubes reaching about to the tip of the abdomen, but not to the tip 
of the tail, rather robust. Tail about three fourths the length of the 
honey-tubes. Antennae rather short not reaching quite to the base of 
the honey-tubes. 
Wingless specimens. —Rather oval in form and broader than the 
winged. 
The accompanying note from Dr. Bundy is as follows: 
“On Apocynum cinnabinum; June, Sauk City, Wis. Female— 
abdomen dirty green, tipped with black, a few black spots above and 
below on the medium line posteriorly; honey-tubes black; thorax black 
except prothorax which is dull greenish-brown, with a narrow, trans¬ 
verse dorsal stripe which is black; head, eyes and antennae black; 
