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 rosse Linn., at Mesilla Park, N. Mex. 
This species has been previously reared, as stated by Dr. L. 0. 
Howard x from Scliizoneura lanigera Haussm., Colopha eragrostidis 
Middl., Aphis orassicsd Linn., Pemphigus fraxinifolii Riley, Aphis 
monardse OestL, Macrosiphum rosse 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. — ApJielinus 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 seiarise Thos. at 
Wellington. 
Aphelinus semiflavus How. (fig. 32) was first reared from Myzus 
persicse Sulz. and Chaitophorus timinalis 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. 3G5-366, 1908. 
