304 
Indiana University Studies 
TYPES. — Two females and two galls in the Berlin Museum. From 
North America (without definite locality), probably from Texas; credited 
to Quercus rubra (certainly by mistake) ; Van Zandt collector. 
The present re-descriptions are based on the original figure and 
description, and on gall material I have from Texas. 
In 1880 Karsch described Diplolepis rubrae. His material 
came from Van Zandt, without definite locality, but it may be 
presumed to have come from Texas where the same collector 
had obtained other material. The insect was labelled as from 
“red oak”, which of course is an impossible host for any spe- 
cies of true Cynips. The types of Karsch’s rubrae are in the 
Berlin Museum, and no American student of Cynipidae has 
examined them. Fortunately the published description was 
accompanied by drawings of the gall and of wings of the in- 
sect, and both are reproduced in the present paper. 
I know of no galls in the United States which agree with the 
description and figure of rubrae except Cynips centricola , 
Amphibolips inanis and Cynips mirabilis. Neither inanis nor 
mirabilis have wings of the sort figured for rubrae . On the 
other hand, I can see nothing in Karsch’s drawings or descrip- 
tions which would rule out centricola , and the cubital cell 
markings in the figure are peculiar to centricola. I have no 
doubt that rubrae represents some variety of centricola. 
That our present species occurs in Texas, where the rubrae 
types are presumed to have originated, is verified by gall ma- 
terial which I have (without insects) from Marshall, in the 
northeastern corner of that state; and Weld has galls from 
localities just north of that state in Arkansas and Oklahoma. 
Judging from the ranges of other Cynipidae, the Texan variety 
should not occur north of central Arkansas or east of western 
Florida. However we must await insect material from that 
area and an examination of the Berlin types before we can 
make critical comparisons. 
Cynips centricola variety strians, new variety 
agamic form 
Figures 48, 256-257, 286 
Diplolepis centricola err. det. Weld (in large part), 1926, Proc. U.S. 
Nat. Mus. 68 (10) : 23. 
FEMALE. — Largely black but often with a rufous tinge on the 
thorax and even more rufous on the head; median groove almost always 
