The Gall Wasp Genus Neuroterus 
(Hymenoptera)‘ 
By Alfred C. Kinsey, Assistant Professor of Zoology in 
Indiana University 
Neuroterus is one of the most primitive of the genera 
of those Cynipid^ which are restricted to oaks, and is there- 
fore of general interest in its exhibition of the origins of 
the more remarkable characters and biologic phenomena found 
in the higher gall wasps. Considerable evolution has oc- 
curred within the genus, and probably some degenerative 
evolution, and with the additional quantity of data which 
the detailed taxonomic study of any group will furnish, there 
is enough matter of general import to warrant the present 
revision. 
This paper proposes a new classification of the known 
species of the world, recognizing 6 subgenera (3 new names) ; 
treats 63 American forms (all known) in detail, with an 
arrangement of species and varieties, 23 of which are pre- 
viously undescribed, furnishes bibliographies and comparative 
descriptions, critically examines host and distribution data, 
figures galls of all of The species, and figures details of 
mportant insect structures; summarizes our knowledge of 
life histories, giving indirect information on the life histories 
of 31 varieties the data for which have been previously un- 
known or unrecognized; and summarizes in the paragraphs 
immediately following that part of the study which has the 
most wide biologic interest. 
The sources of my information have been the published 
data, material and field observations from my own collection, 
and material and observations from a number of museums 
and personal correspondents, I have seen paratypes of all 
but 11 of the 63 varieties, and I can make well-founded inter- 
pretations of all but 1 of those not represented by types. I 
have made a clear statement wherever I have not seen type 
material of any variety. In most cases I have seen good 
1 Contribution from the Zoology Department of Indiana University Number 197 
(Entomological Number 5). 
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