92 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



BIBLIOGRAPHY. 



For the purposes of this paper the following references are of chief 

 importance. 



1900. Johnson. Nectarophora destructor. Can. Ent. Vol. 32, pp. 56- 

 60. Figs. 4-6. Original description. 



1900. Sanderson. Nectarophora pisi. Delaware College Agricultural 



Experiment Station. Bulletin No. 49. 



1901. Chittenden. Nectarophora destructor. U. S. Dept. Agric. Bu- 



reau of Entomology, Circular No. 43. 

 1901a. Sanderson. Nectarophora pisi. Can. Ent. Vol. 33, pp. 31-39 and 



74, figures. 

 igoib. Sanderson. Nectarophora pisi. 12th Ann. Rept. Del. Col. Agric. 



Expt. Sta., pp. 169-186. Plate II. 

 1909. Chittenden. Macrosiphum pisi. U. S. Dept. Agric, Bureau Ent. 



Circular No. 43, 2nd ed. 

 1909. Folsom. Macrosiphum pisi. In the 25th Report of the State 



Entomologist on the Noxious and Beneficial Insects of Illinois. 



1882. Ashmead. Siphonophora solanifolii. Can. Ent. Vol. 14, p. 92. 

 Original description of apterous, viviparous form. The de- 

 scription of so-called "male" is some other species. 



1905. Fletcher. Nectarophora solanifolii. Ann. Rept. on Expt. Farms 

 for 1904, p. 228. 



1907. Fletcher. Nectarophora solanifolii. Ann. Rept. on Expt. Farms 

 for 1906, p. 210. 



1907. Patch. Nectarophora solanifolii. Me. Agr. Expt. Sta., Bulletin. 

 147, pp. 235-257. Figs. 25-33. 



