June, 1922 bionomics of alpiielinus semiflavus 235 



SECONDARY PARASITES. 



Throughout most of the winter of 1921-22, at Columbus, 

 Ohio, very few secondary parasites appeared to infest Apheliniis 

 in the greenhouse insectary. But by February, two species 

 began to appear in from ten to twenty percent of the specimens 

 taken in the open greenhouse. One was determined by Mr. 

 Gahan of the United States National Museum, as Asa plies 

 {Megorismiis) a?nericana Gir., and the other by Mr. Rowher, 

 also of the Museum, as Alloxysta sp., a Figitid resembling 

 Charips (Allottria). 



In the fall of 1921, another secondary was reared from a 

 new species of Apheliniis on a juniper aphid near Philadelphia, 

 Pennsylvania, which likewise proved to be a secondary of 

 Apheliniis semiflavus. This was determined by Mr. Gahan as 

 Aphidencyrtus aphidiphagits Ashm. 



LITERATURE. 



Agee, H. F., and Swezey, O. H. 



1919. Director's Report to the Annual Meeting of Hawaiian Sugar Planters 

 Association. Dec. 2, 3 and 4, 1919, pp. 153. 

 Back, F. A. and Pemberton. 



1916. Parasitism Among the Larvae of the Mediterranean Fruit Fly (Cera- 

 titis capitata). Jour. Econ. Entom. 9:306, 1916. 

 Gahan, A. B. 



1911. Aphidininae of North America. Maryland Agric. Exp. Sta., Bull. 

 No. 152. 



GiRAULT, A. A. 



1909. A New Chalcidoid of the Eulophid Genus Aphelinus Delman. Parasitic 



on Schizoneura crataegi Oestlund, Psyche. Vol. 16, pp. 29-31. 

 1911. A New Aphid-infesting Aphelinus which is not Black. Entomologist, 



Vol. 44, pp. 178-179. 

 1916. Description of and Observation on some Chalcidoid Hymenoptera. 



Canadian Entom. xlviii. No. 7, July, 1916. pp. 242-246. 

 Howard, L. O. 



1907. New Genera and Species of Aphelininae, with a Revised Table of 



Genera. U. S. D. A., Div. Ent., Tech. Ser. 12, pp. 69-88. 



1908. The Importation of Tetrastichus xanthomelaenae Rond. Jour. Econ. 



Entom. Vol. I, No. 5, p. 281. 

 1908a. Upon the Aphis-Feeding Species of Aphelinus, Ent. News, Vol. 19, pp. 

 365-367. 



1910. On the Habit with Certain Chalcidoidea of Feeding at Puncture Holes 



Made by Ovipositor, Jour. Econ. Entom. Vol. 3, pp. 257-260. 



1911. Existe-t-il un Changement dans la fauna des Aphelinidae en Europe? 



Bull. Soc. Ent. France, 1911, pp. 258-259. 

 1911. A New Aphis-Feeding Aphelinus. Proc. Biol. Soc. Wash. D. C. Vol. 25, 

 Mar. 31, pp. 77-78. 



