56 
Siphoxophora setari js. Thomas. The Bottle-Grass Aphis. 
This species was found in August on the heads of a species of 
bristly Fox-tail grass, usually known as Bottle Grass (Setaria glaum.) 
These plant-lice appear to confine themselves to the heads, feeding on 
the rachis and on the little fruit pedicels. Occasionally they wander ■ 
to the stems and even to the leaves. What appears to be the same 
species, was found about the same date on the heads of the Cocks¬ 
comb grass (Panieum crus-corvi). 
Pupa .—Somewhat oval in form, width about two-thirds the length. 
Length about .05 of an inch. Antenme nearly as long as the body, 
seventh joint about equal in length to the third and fourth; without 
hairs. Honey-tubes slightly enlarged at the base, cylindrical, reaching 
nearly to the tip of the abdomen; tail distinct, conical, about as long 
as the width of the preceding segment, rather broad. Wing-pads 
distinct. 
General color brown or brownish with a slight olive tint; first and 
second joint of the antenna? dusky, third and fourth bright yellow, 
apex dusky; eyes black; wing-pads greenish at the base. 
Wingless female. —Honey-tubes extending slightly beyond the tip of 
the abdomen, black; tail white; legs yellow, except the joints and tarsi 
which are dusky, the femora are generally white at the base, growing 
darker toward the apex. Antenna* nearly or quite as long as the 
body, marked as in the pupa except that the light portions are clear 
white. Beak reaching nearly to the hind coxae, pale and apparently 
slightly enlarged at the tip. 
Winged females .—Antennae similar to that of the wingless specimens, 
except that, they are a little longer, the third, fourth and fifth joints be¬ 
ing slightly elongated but bearing the same proportion to each other 
as in the pupa; third joint, under a strong magnifier, shows very dis¬ 
tinct glassy or cicatrized spots. The mid-rib or subcostal vein of the 
forewings is stout and runs parallel with the costal vein; the three dis- 
coidal veins about equally distant from each other at the base; the 
first slightly curved inward toward the base of the wing as it ap¬ 
proaches the hind margin; stigmatic vein regularlycurved; stigma fusi¬ 
form, prominent and opaque, of a brown color. Wings transparent. 
General color similar to that of the pupa. 
The wingless specimens found on cockscomb grass differ only, in 
being of a lighter color—pale uniform plum color; and in having a 
distinct tubercle on each side of the neck; tail rather more elongate and 
narrow. The other markings, which are strongly characteristic, are the 
same, and hence I think this is not a different species. 
Sip hon o piiora euphorbre. 
Thos. The Spotted-Spurge Aphis. 
This and the next species were obtained at Sioux City, Iowa, when I 
was there about the first of September. By some means I have lost the 
note T made in reference to its color and hence can only give the follow¬ 
ing imperfect description from the alcoholic specimens. I remember feel¬ 
ing quite confident at the time the two were discovered that they were 
