112 NEW YORK STATE MUSEUM 



1891 Smith, J. B. N. J. Agric. Exp. Sta. 12th Rep't, p. 397-402 (Diplosis) 



1 89 1 Ins. Life, 4:45 (Diplosis) 



1 891 Riley, C. V. & Howard, L. O. Ins. Life, 4: 161 (Diplosis) 



1 891 Coe, A. J. Count. Gent., 56:896 



1891 Lintner, J. A. Garden & Forest, 4:276 (Diplosis) 



1 891 Ritzema Bos. J. Tiersche Schadlinge und Niitzlinge, p. 587 (C. 

 nigra Meig.) 



1892 Smith, J. B. Ins. Life, 5:94 



1892 Lintner, J. A. Science, 19:343-44 (Diplosis) 



1892 Theobald, F. V. British Flies, p. 64 (C. n i g r a Meig.) 



1893 Lintner, J. A. Injur. & Other Ins. N. Y., 8th Rep't, p. 140-51 (Diplosis) 



1893 Smith, J. B. Ent. News, 4 : 297-99 



1894 — ■ — ■ N. J. Agric. Exp. Sta. Bui. 99, p. 1-14 (Diplosis) 



1895 Lintner, J. A. Count. Gent., 50:456, 472 (Diplosis) 



1895 ■ Injur. & Other Ins. N. Y., 10th Rep't, p. 386-87 (Diplosis) 



1896 — ■ nth Rep't N. Y. State Ent., p. 166-69 



1897 DelGuercio, G. Soc. Ent. Ital. Bui. 29, p. 17-23 (Cecidomyia) 

 1897 Felt, E. P. Psyche 8, p. 3, 4, 5 



1901 Howard, L. O. Ins. Book, p. 114 



1902 Banks, Nathan. U. S. Dept. Agric, Div. Ent. Bui. 34, n. s. p. 46 

 1902 Smith, J. B. N. J. Agric. Exp. Sta. Bui. 155, p. 32 



1907 Theobald, F. V. Rep't of Econ. Zool., p. 65-67 (Diplosis) 



1907 Marchal, Paul. Ent. Soc. Fr. Ann., v. 76; separate, p. 1-27 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 393 



1909 — ■ Ent. Soc. Ont., 39th Rep't, p. 43 



This insect is, without much doubt, a European form which seem 

 to have become established in this country about 1877. Its firs 

 appearance was on the fruit farm of Coe Brothers at Meriden, Conn., 

 whither it was probably brought with some pear stock imported 

 from France in the above-mentioned year. It was at first not very 

 destructive, but in 1884 a large quantity of fruit ruined by the 

 maggots attracted attention and it was at this time brought to the 

 notice of entomologists. Subsequently it spread and now is well 

 established in New Jersey, in the Hudson valley, and presumably 

 in other fruit sections of the country. 



Injuries. This insect is more easily detected by the characteristic 

 deformations of the fruit than in any other way. The small yellowish 

 larvae occur within the young pears about the latter part of May and 

 early in June. The infested fruit becomes irregularly distorted and 

 about the time the larvae become full grown, namely June 1st, rains 

 induce a rapid decay and cause it to crack open. 



Life history. The midges appear a little before the pears are in 

 blossom, and display a marked preference for Lawrence pears. The 

 egg laying of presumably the same species, known to Europeans as 

 Cecidomyia nigra Meig., has been observed and described 



