SCUTELLEROCIDEA OF [OWA 105 
acteristic color and other variations may be mentioned here. 
The reddish purple band across the pronotum between the 
humeri may be very broad and conspicuous or entirely absent, 
with all phases of intergradation; the costal margin of the 
hemelytra at the base varies in the same way. Usually the 
connexivum is concolorous but sometimes it is alternated. In 
some specimens the connexivum is entirely concealed by the 
hemelytra. The membrane may be clear or dotted with fuscous. 
A pale, median longitudinal vitta may be present on the scu- 
tellum. The apex of the scutellum may or may not be pale or 
reddish. In some individuals the humeral angles are more or 
less spinose. The antero-lateral pronotal margins may vary 
from greenish to pale yellow or sanguineous. The general col- 
oration may vary from dark green. to pale green to very pale 
testaceous; individuals taken in autumn are likely to be yellow- 
ish or brownish; some specimens are whitish green; while some 
individuals may be quite hairy others have this character little 
developed. All the variations here discussed are exhibited in 
the more than seventy Iowa specimens before me. 
Osborn listed this species as ‘‘Not common”’ in the state and 
added, ‘‘This appears to be nearly its eastern limit for this lati- 
tude.’’ (Proce. Ia. Acad. Sci., I, Pt. II, 121, 1892.). We have 
taken the species in practically every locality visited and some- 
times in considerable numbers. Curiously enough, not a single 
specimen was taken in the Lake Okoboji region during the sum- 
mer of 1916 although the species occurs in northwestern Iowa 
for I have one specimen. from Rock Rapids. However, in our 
experience, this bug has been much less common in the northern 
part of the state than in the southern part. 
The height of abundance seems to be in July with August 
coming next. My earliest seasonal record is June 30 and the 
latest November 5 when. a specimen was swept from dried grass 
in a sheltered place. On July 15 this species was found to be 
common near Des Moines in fields of timothy and red clover; 
both nymphs and adults were taken. Again, on July 20 at 
Chariton and on August 17 at Hampton numbers of this insect 
were taken in similar situations. At Iowa City we have usually 
found it in some numbers in any field of red clover especially if 
