12 



R. OSTEN Sackbn.— Oontribations to the Natural History of the Cyni- 

 pidae of the United States. <Proc. Entom. See. Phil., Vol. II, 

 1863-'64, pp. 33-49; Vol. IV, 1865, pp. 331-380; Trans. Amer. Ent 

 Soc, Vol. Ill, 1870-'71, pp. 54-64. 



Coutinuation of the foregoing paper, both containiiig valuable contributions 

 to the classification of genera and species. 



B. D. Walsh. — On Dimorphism in the Hymenopterous genns Cynips; 

 with an Appendix, containing hints for a new classification of Cyni- 

 pidae, including descriptions of several new species inhabiting the 

 Oak galls of Illinois. <Proc. Entom. Soc. Phil., Vol. II, 1863-'64, 

 pp. 443-500. 



GusTAT Mayr. — Die Genera der gallenbewohnenden Cynipiden. 

 <20ter Jahresbericht der Oommunal-Oberrealschule im I. Bezirk. 

 Wien, 1881. 



W. H. AsHMEAD. — A bibliographical and synonymical catalogue of the 

 North American Cynipidae, with description of new specie.^. 

 <Trans. Amer. Entom. Soc, Vol. XII, 1885, pp. 291-304. 



W, H. AsHMEAD. — Synopsis of the North American subfamilies and 

 genera of Cynipidae. <Trans. Amer. Ent. Soc, Vol. XIII, 1886, 

 pp. 59-64. 



W. H. AsHSiEAD. — On the Oynipidous 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. 



ICHNEUMONID^ . 



Edward Norton. — Catalogue of our species of Ophion, Anomalon, 

 Paniscus, and Campoplex. <Proc, Entom. Soc. Phil,, Vol. I, 1863, 

 pp. 357-368. 



Synoptic arrangement of the North American genera and species of the sub- 

 family Ophioniuae. 



E. T. Cresson. — Descriptions of North American Hymenoptera in the 



collection of the Entomological Society of Philadelphia. <Proc. 



Entom. Soc of Phil., Vol. Ill, 1864, pp. 131-196. 



Consists chiefly of a synopsis of the North American species of the genus 

 Ichneumon. 



E. T. Cresson.— A list of the Ichneamonidae of North America, with 

 descriptions of new species. <Trans. Amer. Entom. Soc, Vol. I, 

 1867, pp. 289-312; Vol. II, 186S-'69, pp. 89-114. 



E. T. Cresson.— Descriptions of new species belonging to the subfam. 

 ily Pimplarise found in America, north of Mexico. <Tran8. Amer- 

 Entom. Soc, Vol. Ill, 1870-'71, pp. 143-172. 



Tabulates the genera Pimpla, Polysphincta, Glypta, Arenetra, Lampronota, 

 Xylonomus, Odontomeras, with a list of all species. 



