kEt^ORT OF THE STATE ENTOMOLOGIST I913 163 



Dasyneura gleditschiae O. S. 



1867 Osten Sacken, C. R. Ent. Soc. Phila. Proc, 6:219-20 (Cecidomyia) 

 1892 Beutenmueller, William. Amer. Mus. of Nat. Hist. Bui., 4 1266 

 (Cecidomyia) 

 1900 Smith, J. B. Ins. N. J. Cat., p. 620 (Cecidomyia) 

 1904 Cook, M. T. Ohio St. Univ. Bui. 15, s. 6, p. 267 (Cecidomyia) 



1903 Ohio St. Univ. Bui. 20. s. 7, p. z^26-27 (Cecidomyia) 



1904 Beutenmueller, William. Amer. Mus. Jour. Guide Leaflet 16, p. 26 

 (Cecidomyia) 



1905 Cook, M. T. Geol. & Nat. Resour. Ind. 29th Rep't, p. 839 (Ceci- 

 domyia) 



1906 Felt, E. P. N. Y. State Mus. Bui. 104, p. 125 (Cecidomyia) 



1906 N. Y. State Mus. Mem. 8, 2:729 (Cecidomyia) 



1908 N. Y. State Mus. Bui. 124, p. 337, 347. 



This species was first observed by Osten Sacken in August 1866 

 on account of its deforming the leaflets of the honey locust, 

 Gleditschia triacanthos. The young leaves are trans- 

 formed into characteristic podlike swellings inhabited by two or 

 three pale orange larvae. Osten Sacken states that the adults began 

 to appear about the loth of August. This species is evidently 

 widely distributed, since it has been recorded by Beutenmueller 

 as not common in Central Park, though Doctor Smith lists it as 

 a common form in New Jersey. It is recorded by Cook in his 

 List of Insect Galls of Indiana, as a common species. This species 

 was also reared by B. H. Walden June 20, 1904 from rolled leaves 

 collected at New Haven, Conn. Beutenmueller reports the appear- 

 ance of the adult in July and August. These records clearly show 

 that the emergence of the flies extends over a considerable period. 



Gall. The gall of this species is composed of a folded leaflet 

 deformed in such a way as to assume the appearance of a pod (pi. 8, 

 fig. 4), each gall containing 2 to 3 pale orange larvae with a very 

 delicate, narrow breastbone. Doctor Cook states that the two halves 

 of. the leaflet never have an opportunity to unfold though there is a 

 growth of cells allowing the leaflet to enlarge and form the larval 

 chamber between the two halves. The cells are at first normal but 

 gradually lengthen in an axis at right angles to the midrib. 



Dasyneura pseudacaciae Fitch 



1859 Fitch, Asa. N. Y. S. Agric. Soc. Trans., 18:833 (Cecidomyia) 



1859 Nox. & Other Ins. N. Y. 5th Rep't, p. 53 (Cecidomyia) 



1874 Glover, Townend MSS. Notes from My Journal Dipt., p. 68 



(Cecidomyia) 

 1890 Packard, A. S. U. S. Ent. Com. 5th Rep't, p. 368 (Cecidomyia) 

 1906 Felt, E. P. Inj. & Other Ins. N. Y. 21st Rep't, p. 125-27 

 1906 Ins. Affect. Pk. & Wdld. Trees, N. Y. State Mus. Mem. 



8, 2:730 



6 



