HYMENOPTEKA. 13 



Osten Sacken, C. R. — Contributions to the natural history of the 

 Cynipidse of the United States. <Proc. Ent. Soc. Phila., n, pp. 

 33-49, 1863-1864 ; iv, pp. 331-380, 1865 ; Trans. Amer. Ent. Soc., 

 in, pp. 54-64, 1870-1871. 



Continuation of the foregoing paper, both containing valuable contribu- 

 tions to the classification of genera and species. 



Walsh, B. D.— On dimorphism in the Hymenopterous genus Cynips ; 

 with an appendix, containing hints for a new classification of 

 Cynipidse, including descriptions of several new species inhabit- 

 ing the oak galls of Illinois. <Proc. Ent. Soc. Phila., n, pp. 

 443-500, 1863-1864. 



Mayr, G. — Die Genera der gallenbewohnenden Cynipiden. <20ter 

 Jahresbericht der Communal-Oberrealschule im I. Bezirk. Wein, 

 1881. 



Ashmead, W. H. — A bibliographical and synonymical catalogue of 

 the North American Cynipidse, with description of new species. 

 < Trans. Amer. Ent. Soc, xn, pp. 291-304, 1885. 



Synopsis of the North American subfamilies and genera of 



Cynipidse. < Trans. Amer. Ent. Soc, xm, pp. 59-64, 1886. 



von Dalla Torre, K. W., et Kieffer, J. J. — Fam. Cynipidse. <Gen. 

 Ins., Fasc 9 & 10, pp. 84, pis. 3, 1902. 



Ashmead, W. H. — On the cynipidous galls of Florida, with descrip- 

 tions of new species and synopses of the described species of 

 North America. < Trans. Amer. Ent. Soc, xiv, pp. 125-158, 



1887. 



Gillette, C. P. — A monograph of the genus Synergus. < Trans. 

 Amer. Ent. Soc, xxm, pp. 85-100, 1896. 



Beutenmuller, W. — The North American species of Rhodites and 

 their galls. <Bul. Amer. Mus. Nat. Hist., xxm-, pp. 629-651, 

 1907. 



The species of Holcaspis and their galls. <Bul. Amer. Mus. 



Nat. Hist., xxvi, pp. 29-45, 1909. 



The species of Amphibolips and their galls. <Bul. Amer. 



Mus. Nat. Hist., xxvi, pp. 47-66, 1909. 

 The North American species of Diastrophus and their galls. 



<Bul. Amer. Mus. Nat. Hist., xxvi, pp. 135-145, 1909. 

 The species of Biorhiza, Philonix, and allied genera and their 



galls. <Bul. Amer. Mus. Nat. Hist., xxvi, pp. 243-256, 1909. 

 Some North American Cynipidse and their galls. <Bul. 



Amer. Mus. Nat. Hist., xxvi, pp. 277-281, 1909. 



Treats of Eumayria, Belonocnema, Solenozopheria, and Compsodryoe- 



