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36. Keeler, H. L. — Our northern shrubs, 1903, illus. 



37. Keeler, H. L. — Our native trees. 1905, illus. 



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39. Lintner, J. A. — The apple maggot. 2d Ann. Rept. N. Y. 

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40. Lochhead, W. — Insects of the season. 33d Ann Rept. Ent. 

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41. O'Kane, W. C. — The apple maggot or railroad worm. N. H. 

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42. O'Kane, W. C. — Control of the apple maggot by picking 

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43. Osborn, H.— The apple maggot. Bui. 13, Iowa Agr. Exp. 

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44. Osborn, H. — Insects of the season in Iowa. Div. Ent., 

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45. Patch, E. M. — Apple maggot and other insects. Maine 

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46. Patch, E. M.— Insect notes for 1906. Maine Agr. Exp. 

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47. Patch, E. M. and Johannsen, O. A. — Apple-tree insects of 

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48. Perkins, G. H. — Trypeta pomonella Walsh. 2d Ann. Rept. 

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49. Perkins, G. H. — The apple maggot. 7th Ann. Rept. Vt. 

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50. Perkins, G. H. — Apple maggot. 9th Ann. Rept. Vt. Agr. 

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51. Quaintance, A. L. — The apple maggot or railroad worm. 

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52. Riley, C. V. — The apple-maggot fly. American Agricul- 

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53. Riley, C. V. — Apple maggot. New York Semi-Weekly 

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54. Riley, C. V.— Amer. Ent. 1880, vol. 3, p. 160. 



55. Ross, W. A. — Recent work on the apple maggot in Ontario. 

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56. Sargent, C. S.— Silva of N. Am. Vol. IV, 1893, illus. 



