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Indiana University Studies 
longer than in the female but distinctly curved; the areolet sm_aller than 
in the female (fig. 13). 
GALL. — An irregular stem swelling, wholly inseparable. Poly- 
thalamous. Individual galls up to 20. mm. long and 8. mm. wide, but 
sometimes several galls are closely adjacent and more or less fused. 
Externally very rough, small, irregular, raised spots indicating some of 
the larval cells; covered with greenish, young bark, drying browner. 
Internally woody, most woody centrally, with a great many, densely 
packed, small larval cells, 1.7 mm. long by 0.7 mm. in width, mostly 
toward the surface; the lining distinct but wholly inseparable. On 
young stems, involving young petioles and deforming the young leaves; 
at the crowns (or on roots?) of Quercus breviloba (figs. 58, 59). 
EANGE. — Texas: Austin. Probably occurs thruout eastern 
Texas and adjacent parts of Louisiana and Oklahoma. 
The agamic generation is known from galls and adults 
obtained by Weld in 1917, and from a quantity of material 
Dr. J. T. Patterson has bred. Several hundred insects of the 
bisexual generation were bred by Dr. Patterson in the spring 
of 1922. I first connected the alternate generations of this 
insect on the basis of the complementary dates of development 
and the extremely close similarity of the insects and galls, 
and this similarity is enough to make the relation unquestion- 
able. Dr. Patterson confirms this by his experimental data. 
The agamic generation starts growth in April ; Dr. Patterson 
describes the galls as nearly fully formed by the last of April, 
with small larvse in the galls by July; Weld found pupse on 
October 16 and 30, with live adults in the galls on December 
1 and 12. Emergence is in the relatively mild winter season 
of Texas or in the early spring, from before the last of Jan- 
uary to after the 7th of February, according to Dr. Patter- 
son’s records. Dr. Patterson states that he has secured 10 
males with 231 females of this agamic generation, but that 
these males are unable to mate with the females, altho they 
attempt to copulate; the females appear to have completely 
lost the mating instincts, as have the males to some degree. 
These males are apparently functionless, which is a most 
interesting case of this sex persisting as a generation becomes 
agamic. I have seen four of these males. The bisexual gen- 
eration develops quickly in the spring. Dr. Patterson obtain- 
ing adults on April 3, 1922. He has sent me almost three 
times as many males as females, so probably the sexes occur 
in about equal numbers. The galls of the two generations 
are similarly located at the crown of the tree, and differ 
