84 
IOWA ACADEMY OF SCIENCES. 
Adult winged viviparous form, from Muldenljergia racemosa. 
Color markings, venation, and length of antennae and wings approxi- 
mately the same as form on Andropogon, but the sensoria on joint III, vary 
from five to seven. 
Apterous viviparous form, from roots of Muhlenbergia. 
Length of body, 1.89mm. Width, 1.29mm. Length of antennae, .80mm. 
Sensoria, one each on joints III, IV, V and VI. Whole body yellow; a 
few dusty brown bands on abdomen. Antennae and legs, dusty brown; eyes, 
red. 
Pupa: Length of body, 1.83mm. Width, .91mm. Length of antennae 
.70mm. Sensoria not distinct except on joints V and VI. 
Apterous viviparous form, from roots of Timothy {S. corni ?.) 
Length of body, 2.00mm; width, 1.43mm; length of antennae .42mm. Sen- 
soria on joints IV and V, one on each joint. Color in balsam decidedly 
yellow. Beak reaching only to second coxae, antennae apparently five- 
jointed. 
All the perennial grass root forms agree in having beak 
reaching slightly beyond second pair of cox^, color of same 
varies from black in adult winged form, to light yellow in pupa. 
In adult winged forms there is a dusky brown patch before the 
anus, while in the apterous forms it is a continuation of the 
dusky bands on the eighth segment. (Possibly these bands and 
the quadrate patch are the location of dermal glands and the 
flocculent material is removed by the ants.) The legs and 
antennm are hairy; body also slightly hairy. 
ScMzoneura cornd, Spring migrant (second generation). Prom 
Cornus: 
Expanse of wings, 6.00mm: length of antennm, .69mm; (Joints I and II 
each, .05mm; III, .26mm; IV, .087mm; V, .095mm; VI, with unguis, .139 
mm). Only two sensoria on joint III, one each on IV, V and VI. Venation 
as in fall migrant. Stigma .348mm by .174mm. Color and markings as in 
autumnal migrant, except the abdomen is reddish brown and without dis- 
tinct quadrate patch, and the membranes of articulation are green. 
(Described with the exception of colors which were taken from notes, after 
clearing in balsam, and too shrunken for measurements and location of 
markings of body.) 
Pupa: Length of body, 1.80mm; width, .87mm; length of antennae, .59 
mm; (joint I, .06mm; II, .065mm: III, .135mm; IV, .07mm; V, .087mm; 
VI, with unguis, .113mm). Sensoria on joint III, four; on IV, V and VI, 
one each. Color, head, wing callosities and margins of thorax, with 
wing pads white, or greenish white; thorax, yellowish brown; antennae and 
legs, dusky white; abdomen light brown with two series of whitish dots on 
2This form has previously been described by Kaltenhach; Monograpliie der Fam- 
lien der Pflanzenlause, 1872, p. 168. 
