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Indiana University Studies 
us our most northern record for an oak-inhabiting cynipid. 
Upon examining the material which Dr. Forsius was good 
enough to send me, I find that most of it is distinct from the 
typical material of Central Europe. I am dedicating the new 
variety to Dr. Forsius to whom we are indebted for much 
information on the northern distribution of many other 
Hymenoptera. I understand that oak dees not extend north 
of the very southern end of Finland, and we are fortunate in 
having cynipid material from that area. 
Forsiusi insects are far more distinct from the Central 
European longiventris than longiventris is from the Central 
European folii or the Mediterranean pubescentis (insects). 
The galls, however, prove the relation of forsiusi to longiven- 
tris, their origin from a common stock, and perpetuation 
by isolation in what seem to be two distinct faunal areas of 
Europe. 
Of the ten insects I have from Lojo, Finland, one is inter- 
mediate between forsiusi and typical longiventris. Three 
insects from Runsula in southwestern Finland approach 
typical longiventris. In a series of 88 adults of this species 
which I have from Denmark (Hoffmeyer coll.) there are five 
insects which approach typical forsiusi, a single insect which 
seems intermediate between forsiusi and longiventris, and 82 
insects which are the Central European longiventris. There 
is apparently some transition area between the more northern 
and Central European faunas, but this probably does not 
extend south of Denmark. 
Forsius records the occurrence of these galls in September, 
and the emergence of the adults on October 81 and November 
1. This emergence is earlier than that for the typical 
longiventris. This matches our experience with many Ameri- 
can Cynipidae among which there are some cases of the 
northern varieties emerging as much as two and a half 
months earlier than the corresponding varieties of the south- 
ern United States. 
Cynips (Cynips) divisa Hartig 
agamic and bisexual forms 
AGAMIC FEMALE. — The entire insect rich rufous and piceous 
(Central Europe) to entirely black (more northern Europe) ; the head 
a little narrower than the rather stout thorax .(Central Europe) or no 
