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Indiana University Studies 
rial (Diplolepis No. 1) on which Fourcroy’s quercus was based ap- 
parently from the neighborhood of Paris; the source of Olivier’s mate- 
rial of scutellaris may also have been central France, or it may have 
been Manosque (the only locality mentioned in the publication) in 
Provence. 
The present descriptions are based on the published descriptions 
cited in the bibliography, and on adults and galls which I have from 
localities in Denmark, Germany, Czecho-Slovakia, Hungary, Austria, 
France, and England, determined by G. Mayr, Forsius, P. Eigen, Noury, 
Sajo, Hoffmeyer, Hedicke, and L. H. Weld, as detailed in the above dis- 
tribution data. 
INQUILINES. — Synergus albipes Hartig (acc. Blosch 1903). 
S. nervosus Hartig (acc. Hartig 1840). Emerges from February 
to April in the following spring (acc. Dalla Torre and Kieffer 1910). 
S. pallicornis Hartig (acc. Hartig 1840). Emerges in May of the 
following spring; lives inside the larval cell (acc. Mayr 1872). 
S. physoceras Hartig? (acc. Dalla Torre and Kielfer 1910). 
S. tscheki Mayr (acc. Mayr 1872). Emerges in April of the fol- 
lowing spring. 
S. varius Hartig (acc. Hoffmeyer 1925). 
S. vulgaris Hartig (acc. Hartig 1840). Emerges from March to 
May in the following spring (acc. Dalla Torre and Kieffer 1910). 
Saphonecrus connatus (Hartig) (acc. Mayr 1872). Emerges in 
April and May of the following spring (acc. Dalla Torre and Kieffer 
1910). 
Steganoptycha corticana H. (acc. Riedel 1910). Lepidopteron. 
[Reinhard, 1865, Berliner Ent. Zeit. 9:2, is in error in saying 
Hartig bred Synergus nigripes and S. flavicornis from folii .] 
PARASITES. — Callhnome antennatus Walker (acc. Mayr-Fitch 
1866). Emerges March to June of the following spring; sometimes 
hyperparasitic on the inquilines. 
Camptoptera dryophantae (acc. Kieffer 1902). 
Cecidostiba truncata Thomson ^ Thomson 1878 acc. Dalla Torre 
1898). 
Decatoma biguttata (Swederus) (acc. Marshall, 1867). Emerges 
in May of the following spring, earlier indoors (acc. Mayr-Fitch 1876). 
D. strigifrons Thomson (Kieffer 1886 acc. Kieffer 1899). 
Eupelmus urozonus Dalman (acc. Ruschka 1920). 
E. vesicularis (Retzius) (acc. Ruschka 1920). 
Eutelus dilectus Walker (acc. Fahringer 1921). 
Eurytoma appendigaster (Swederus) (Moller 1882 acc. Dalla Torre 
1898). 
E. aterrima (Schrank) (Rondani acc. Dalla Torre 1898). 
E. nodularis Boheman (acc. Mayr-Fitch 1876). 
E. rosae Nees (acc. Ratzeburg 1848). Emerges in May and June 
of the following year (acc. Mayr 1878). 
Habrocytus saxesenii Ratzeburg (acc. Riedel 1910). 
Megastigmus dorsalis (Fabricius) (acc. Mayr-Fitch 1876). 
