REPORT OF THE STATE ENTOMOLOGIST 1901 (27 
1880 Hagen, H. A. Hessian fly not imported from Europe. Can. ent. 
12: 197-207 (discussion of subject). 
1880 Hagen, H. A. Probable parthenogenesis of Cecidomyia de- 
structor. N. Am.ent. 1:65-66 (notes on development of unfertilized eggs). 
1880 Lintner, J. A. Hessian fly. Country gentleman, July 8, 45:439: 
(brief general account). 
1880 Packard, A. S. Hessian fly. Am. ent. 3:118-21 (preliminary 
notes). 
1880 Packard, A. S. Hessian fly. U.S. ent. com. Bul. 4, p. 1-43 (de- 
tailed account); Hessian fly. Am. nat. 14:586 (notes on work done in 
controlling pest). 
1880 Riley, C. V. Probable parthenogenesis in the Hessian fly. Aim, 
ent. 3:127 (parthenogenesis and relative abundance of Hessian fly). 
1881 Riley, C. V. Hessian fly. Am. nat. 15:750 (Hessian fly 
abundant in central and southern Illinois and in Missouri); Effect of 
drought on Hessian fly, p. 916 (records drying up of puparia). 
1881 Riley, C. V. Hessian fly. Am. nat. 15:750 (record of injury in 
Illinois and Missouri). 
1882 Lintner, J. A. Hessian fly in Ohio. Country gentleman, July 20, 
47:567 (brief note identifying Hessian fly). 
1883 Hagen, H. A. Hessian fly not imported from Europe. U. S. 
ent. com. 3d rep’t. App. p. 48-49 (résumé of evidence). 
1888 Koppen, F. T. Account of the Hessian fly. U. S. ent. com. 3d 
rep’t. 1883. App. p. 41-42. 
1883 Packard, A. S. Hessian fly—its ravages, habits and the means. 
of preventing its increase. U. S. ent. com. 8d rep’t. 18838. p. 198-248 
(detailed account). 
1885 Forbes, S. A. Ill. state ent. 14th rep’t, p. 38-50 (notes on life 
history and parasites). 
- 1885 Hagen, H. A. Further material concerning the Hessian fly. 
Can. ent. 17:81-93 (records concerning early occurrence of pest in 
America); On the Hessian fly in Italy, p. 129-31 (notes). 
1885 Webster, F. M. Purdue univ. Sch. of agric. Bul. 1, p. 1-10 (brief 
general notice). 
1886 Riley, C. V. On the parasites of the Hessian fly. U. S. nat. 
mus. Proc. 1885. 8:418-22 (critical, descriptive and biologic accounts). 
1887 Forbes, S. A. Ill. state ent. Bul. 3, p. 45-61 (observations on life 
history). 
1888 Forbes, 8S. A. New parasite of the Hessian fly. Psyche, 5:39-40 
(describes Platygaster hiemalis). 
1888 McMillan, Conway. Neb. agric. exp. sta. Bul. v. 1, no. 2, p. 17-23 
(brief general notice). 
1888 Riley, C. V. Hessian fly an imported insect. Can. ent. 20:121- 
27 (discussion of evidence relating to the introduction of this pest); Insects 
confounded with the Hessian fly prior to the revolution. Insect life, 1:86 
(states that species Chlorops or Meromyza has been con- 
