PARASITES, APHELINUS. 



123 



Ind., and from Colopha eragrostidis Middl. at Mt. Vernon, Ind. 

 Mr. Kelly reared it from Pemphigus fraxinifolii Kiley and from an 

 aphidid taken on Panicum sp. Mr. C. N. Ainslie reared it from 

 Macrosiphum rosx Linn., at Mesilla Park, N. Mex. 



This species has been previously reared, as stated by Dr. L. O. 

 Howard * from Schizoneura lanigera Haussm., Colopha eragrostidis 

 Middl., Aphis orassiczz Linn., Pemphigus fraxinifolii Riley, Aphis 

 monardse Oestl., Macrosiphum rosx Linn., Aphis sacchari Zehntn., and 

 Tetraneura colophoidea. 



Aphelinus nigritus How. (fig. 31) was first reared from Toxoptera 

 at Spartanburg and Clemson, S. C, by Mr. G. G. Ainslie. It was 



Fig. 31. — Aphelinus nigritus, a parasite of the spring grain-aphis. Greatly enlarged, a, Stigmal club, 



still more enlarged. (Original.) 



reared from the same species of aphidid by Mr. C. N. Ainslie at 

 Springer and Mesilla Park, N. Mex., and St. Anthony Park, Minn. 

 Mr. T. H. Parks reared it from Toxoptera at Wellington, Kans., and 

 Messrs. Kelly and Urbahns reared it from Aphis setarix Thos. at 

 Wellington. 



Aphelinus semiflavus How. (fig. 32) was first reared from Myzus 

 persicx Sulz. and Chaitophorus viminalis Monell by Prof. C. P. Gil- 

 lette at Fort Collins, Colo., in 1908. It was later reared by Mr. G. G. 

 Ainslie from Toxoptera at St. Anthony Park, Minn., and from a 

 black aphidid on bluegrass (probably Rhopalosiphum pose Gill.) at 

 Mesilla Park, N. Mex., by C. N. Ainslie. 



i Ent. News., vol. 19, no. 8, pp. 365-366, 1908. 



