478 JOIRNAL OF ECONOMIC ENTOMOLOGY IVol. 14 



area the better would be the protection of the -vastly more important 

 cotton sections within range of flight of the two insects here discussed. 

 However, the direct results of migrations of weevils forced in the fall 

 of 1919 have not yet been ascertained since the inspections in the field 

 have covered only an insignificant fraction of the total number of cotton 

 stalks. In Pima count}' alone there were approximately forty million 

 stalks and the ISS man-days spent in field inspections could not have 

 been equivalent to the thorough inspection of a hundred thousand of 

 these. If the assumption is correct that no infestations exist in Arizona 

 out-side of the fields where the weevil was actually found, the protec- 

 tive value of the outlaw cotton was greater even than I had supposed. 

 Necessary space limitations make it impossible to consider here the 

 proper methods of dealing with the wild cotton problem in Arizona. 

 The writer plans to discuss this in other papers on the subject. The 

 more immediate need is for an understanding in political circles of how 

 not to deal with the problem and this paper will doubtless serve a use- 

 ful purpose in this connection. 



OBSERVATIONS ON NATURAL ENEMIES OF THE FALL CAN- 

 KER-WORM (ALSOPHILA POMETARIA PECK) IN FORESTS OF 

 SOUTHERN ALLEGHANY MOUNTAINS, IN 1920 



By F. Sherman, Entomologist, State Dept. Agriculture, Raleigh, N. C. 



The Condition 



In the years 1917, 1918, and 1919 there were repeated reports of 

 injury b}^ Fall Canker-worm to certain limited areas of wild mountain 

 forests in western North Carolina. Approxunately twenty such areas, 

 in nine different counties, were reported, — the areas varying in extent 

 from 10 to 200 acres or more. The injur\' occurs chiefly in June. Land 

 owners were not fam.iliar with this insect, and were apprehensive lest it 

 should continue to increase and spread until the forests were damaged 

 beyond recover}-. 



As most of the areas are without roads, with steep slopes and often 

 with much miscellaneous undergrowth, such methods as banding and 

 poisoning were out of the question. It was therefore decided to make a 

 study of the natural enemies during June of 1920. The area selected 

 was on the sumjnit of Hum-p-back Mountain in Avery County, N.C., 

 4,170 feet elevation, giving conditions suggestive of the more northern 

 states — Transition Life-Zone, bordering on the Canadian. The obser- 

 vation covered the period from May 27 to June 24, 1920. 



