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Indiana University Studies 
Cynips. The galls of verrucosa are strictly leaf galls, the 
result of the oviposition of the agamic insect in the large 
terminal buds where the young leaves are fairly well de- 
veloped, instead of in the undeveloped, adventitious buds 
patronized by folii and longiventris. Adler averred (1881) 
that even when the verrucosa galls appear to be on the young 
shoots, small axillary buds will be found in the angles be- 
tween the galls and the shoots, evidencing the origin of the 
gall from young leaves. 
The insects of verrucosa are easily recognizable from the 
bisexual forms of other European Cynips. Schlechtendal’s 
original description (quoted above) is precise in its character- 
ization of the adults, but the descriptions (both of the insects 
and the galls) in the later European work are poor and 
evidently not based on actual specimens. 
The young galls appear when the buds of the oaks first 
open, which is late in April or early in May (acc. Schlech- 
tendal 1870) in most of the range of the insect. Adler (1881) 
reported mature galls by the end of May with the insects 
emerging late in May or early in June. Schlechtendal’s ma- 
terial emerged late in May. 
Altho the galls of the agamic divisa are abundant in Central 
Europe, the collections of the bisexual form have been few, 
and this is one of the European cynipids that needs further 
observations. Adler showed that the agamic divisa gives rise 
to the bisexual verrucosa, but he did not obtain return data. 
There seems to be no reason for questioning this relation, 
altho experimental proof of it would be worth obtaining. 
Cynips divisa variety atridivisa, new variety 
agamic form 
Figures 18, 103 
FEMALE. — The entire body including the femora and tibiae piceous 
to back; head fully as wide as the rather slender thorax; mesonotum 
almost entirely smooth and naked with only a few stray hairs around 
the rim; the anterior parallel and lateral lines practically obliterated; 
the mesopleuron less hairy than in divisa; the tip of the second abscissa 
of the radius without any enlargement; length 1.8 to 2.8 mm., averag- 
ing near 2.0 mm. 
GALL. — Apparently not different from that of variety divisa, unless 
it averages smaller; on Quercus pedunculata. 
