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Indiana University Studies 
cator of ozark blood in a hybrid is the darker color of the face, 
mesonotum, and basal segment of the abdomen; but variety 
wheeleri should have much this same influence in a hybrid, so 
it is not always possible to distinguish ozark from ivheeleri in 
anything but a pure population, or in a series in which pure 
ozark appears as a segregate out of the hybrid. In central 
Missouri and parts of central Illinois, ozark grades (by hy- 
bridization) into the more northern erinacei. One will be 
hopelessly confused by these various hybrids in the extensions 
of the range unless material from the purer population of 
Kentucky and the Ozark mountain region is studied first. 
In the heart of the range of variety ozark, the spiny form of 
gall is more common, but the entirely naked form is also 
present, suggesting that this variety may have had a hybrid 
origin similar to that suggested for erinacei (q. v.) , but I am 
at a loss to suggest possible ancestors of ozark. Insects bred 
from both types of galls of ozark seem indistinguishable. We 
located one large, isolated tree of Q. alba just west of Olney, 
Illinois, well covered with the smooth form of the galls of this 
species, and without a single apparent specimen of the spiny 
gall. The complete isolation of the tree suggested that we had 
here a strain which was pure for the hereditary factors for 
a smooth gall. Such a strain would be expected to hybridize 
with spiny gall forms on less isolated trees. Careful examina- 
tion of the large series bred from this isolated tree fails, how- 
ever, to show any morphologic character to distinguish the 
insects except a shorter average length. Further examination 
of this isolated tree in the next few years may lead to interest- 
ing data as to the possibility of such a strain maintaining its 
purity thru successive generations. 
We have secured mature galls of this variety as early as 
August 2 (in 1927) from southern Illinois. Our emergence 
dates for the insect are November 5, 16, 18, and 20, and De- 
cember 1, 4, 7, 8, 10, 12, 14, 15, 18, 19, 20, and 22. 
Cynips pezomachoides variety wheeleri, new variety 
agamic form 
Figures 65, 374, 417 
Cynips pezomachoides var. C Kinsey, 1927, Field and Lab. Manual in 
Biol.: 108. 
FEMALE. — The head entirely black, ordinarily without any rufous 
on the face laterally; the basal halves of the antennae dark brown but 
not rufous; the mesonotum varying from dark rufous to entirely black, 
