12 
R. OSTEN SACKEN.—Contributions to the Natural History of the Cyni- 
pide of the United States. <Proc. Entom. Soc. Phil., Vol. II, 
1863-64, pp. 33-49; Vol. IV, 1865, pp. 331-380; Trans. Amer. Ent. 
Soe., Vol. IIT, 187071, pp. 54-64. 
Continuation of the foregoing paper, both containing valuable contributions 
to the classification of genera and species. 
B. D. WALSsH.—On Dimorphism in the Hymenopterous genus Cynips; 
with an Appendix, containing hints for a new classification of Cyni- 
pide, including descriptions of several new species inhabiting the 
Oak galls of Illinois. <Proc. Entom. Soc. Phil., Vol. Il, 185364, 
pp. 443-500. 
GusTAV MAyr.—Die Genera der gallenbewohnenden Cynipiden. 
<20ter Jahresbericht der Communal-Oberrealschule im I. Bezirk. 
Wien, 1881. 
W. H. ASHMEAD.—A bibliographical and synonymical catalogue of the 
North American Cynipidz, with description of new species. 
<Trans. Amer. Entom. Soc., Vol. XII, 1885, pp. 291-304. 
W. H. ASHMEAD.—Synopsis of the Nortb American subfamilies and 
genera of Cynipide. <Trans. Amer. Ent. Soc., Vol. XIII, 1886, 
pp. 59-64. 
W. H. ASHMEAD.—On the Cynipidous Galls of Florida, with descrip- 
tions of new species and Synopses of the described species of North 
America. <Trans. Am. Entom. Soc., Vol. XIV, 1887, No. 2, pp. 
125-158. 
ICHNEUMONIDZ. 
EDWARD NortTon.—Catalogue of our species of Ophion, Anomalon, 
Paniscus, and Campoplex. <Proc. Entom. Soc. Phil., Vol. I, 1865, 
pp. 357-368. 
Synoptic arrangement of the North American genera and species of the sub- 
family Ophionine. 
BE. T. CRESSoN.—Descriptions of North American Hymenoptera in the 
collection of the Entomological Society of Philadelphia. <Proc. 
Entom. Soc. of Phil., Vol. II, 1864, pp. 131-196. 
Consists chiefly of a synopsis of the North American species of the genus 
Ichneumon. 
EK. T. CRESSoN.—A list of the Ichneumonide of North America, with 
descriptions of new species. <Trans. Amer. Entom. Soe., Vol. I, 
1867, pp. 289-312; Vol. I, 1868~69, pp. 89-114. 
E. T. CRESsSon.—Descriptions of new species belonging to the subfam. 
ily Pimplariz found in America, north of Mexico. <Trans. Amer- 
Entom. Soe., Vol. III, 1870-71, pp. 143-172. 
Tabulates the genera Pimpla, Polysphincta, Glypta, Arenetra, Lampronota, 
Xylonomus, Odontomerus, with a list of all species. 
