48 BULLETIN" 100, U. S. DEPARTMENT OF AGRICULTURE. 



1910. Williams, T. A. The Aphididag of Nebraska. Nebr. Univ. Studies, v. 10 

 no. 2, pp. 85-175, April, 1910. 



" Callipterus caryx Monell,'' p. 115. Description and note of occurrence. 



1910. Gillette, 0. P. Plant-louse notes, family Aphididse (continued), pi. 24. Jour. 

 Econ. Ent., v. 3, no. 4, pp. 367-371, Aug., 1910. 

 " Monellia caryx," p. 367. Note of occurrence and figure. 



1910. Davis, J. J. A list of the Aphididse of Illinois, with notes on some of the 

 species. Jour. Econ. Ent., v. 3, no. 5, p. 407-120, Oct., 1910. 

 " Callipterus caryx Monl.," p. 417. Note of occurrence. 



Monellia caryella Fitch. 



1855. Fitch, Asa. First Report on the Noxious, Beneficial, and other Insects of 



the State of New York, Albany, 1855. 



"Aphis caryella Fitch," pp. 163-165. Original description. 



1856. Fitch, Asa. Third Report on the Noxious and other Insects of the State of 



New York, Albany, 1856. 



"Hickory gay-louse, Callipterus caryellus Fitch," pp. 448-449. Short description. 



1862. Walsh, B. D. On the genera of Aphididse found in the United States. Proc. 

 Ent. Soc. Phila., v. 1, pp. 294-311. 



" Callipterus caryellus Fitch," p. 302. Reference. 



1879. Thomas, Cyrus. Eighth Report of the State Entomologist on the Noxious 

 and Beneficial Insects of the State of Illinois, Springfield, 1879. 

 " Callipterus caryellus Fitch," pp. 170-171. Note of occurrence. 



1887. Oestlund, O. W. Synopsis of the Aphididse of Minnesota. Geol. and Nat. 

 Hist. Survey Minn. Bui. 4. 



" Monellia caryella Fitch," p. 45. Genus Monellia erected. Note of occurrence. 



1910. Davis, J. J. A list of the Aphididse of Illinois, with notes on some of the spe- 

 cies. Jour. Econ. Ent., v. 3, no. 5, pp. 407-420. 

 "Monellia caryella Fitch," p. 419. 



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