II2 NEW YORK STATE MUSEUM 
1891 Smith, J.B. N. J. Agric. Exp. Sta. 12th Rep’t, p. 397-402 (Diplosis) 
1891 ———__ Ins. Life, 4:45 (Diplosis) 
1891 Riley, C. V. & Howard, L. O. Ins. Life, 4:161 (Diplosis) 
1891 Coe, A. J. Count. Gent., 56:896 
1891 Lintner, J. A. Garden & Forest, 4:276 (Diplosis) 
1891 Ritzema Bos. J. Tiersche Schadlinge und Nttzlinge, 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. nigra 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. Bul. 99, p. I-14 (Diplosis) 
1895 Lintner, J. A. Count. Gent., 50:456, 472 (Diplosis) 
1895 ———————_ Injur. & Other Ins. N. Y., roth Rep’t, p. 386-87 (Diplosis) 
1896 —— 11th Rep’t N. Y. State Ent., p. 166-69 

1897 DelGuercio, G. Soc. Ent. Ital. Bul. 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. Bul. 34, n. s. p. 46 
1902 Smith, J.B. N. J. Agric. Exp. Sta. Bul. 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. I-27 
1908 Felt, E. P. N. Y. State Mus. Bul. 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 ist, 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 
