95 



This gall was recently described by Beuteumiiller as follows : "Green, 

 sometimes tinged with red. rounded or elongated and of the texture of the 

 stem of the plant. Inside it is soft, fleshy, and contains a single larva in 

 an elongated narrow channel. Lengtli about 7 to 12 mm. ; width 5 to 

 9 mm." 



"When dry the gall becomes brown and pithy inside and somewhat 

 resembles a cherry pit. It is usually situated on the midrib of the leaf 

 of the ironweed {Vernonia novel)0)-acensis) ." 



Mr. Beutenmiiller reports it from Black Mountains, N. C, Staten 

 Island, N. Y., and Indiana ; the last records being from the writer's ma- 

 terial. I have since collected it in Delaware. Mr. Greene's specimen is 

 on Vernonia glgantia. 



C'EciDOiiYiA SALicxFOLiA Osteu Sackeu. 

 Cecidomyia salicifoUa — 



Qsten Sacken. Proc. Ent. Soc. Phil. Vol. VI. p. 220. 



Aldrich, Cat. N. A. Dipt. 19U5. p. 163. 



This gall bears a striking resemblance to the gall of Cecidomyia gledit- 

 scMae O. S. The leaves are folded along the midrib, the edges uniting and 

 the sides bulging out, thus forming a pod like structure which may be 14 - 

 inch or more in length. 



This gall was hrst described by Osten Sacken from material collected 

 by Wm. Couper in Quebec. He also states that he found a similar gall 

 at Nahant on Spiraea tomentosa and I have received from Dr. L. M. Under- 

 wood, of Columbia University, what appears to be the same gall on S. 

 tomentosa. I have collected what appears to be the same gall in Ohio on 

 S. salicifolia. Mr. Greene's Indiana material is on -S'. salicifoUa. 



Ckcidomyia viticola Osten Sacken. 



Cecidomyia viticola- — 



Osten Sackeu. Stettin. Entftmol. Zeit. 22. 18(51. 



Osten Sacken, Mon. Dipt, of N. A. Pt. I. 1S(!2. j.. 202. 



Williams, 8th Rpt. Ent. Soc. Ont. 1877. 



Saunders, Ins. Inj. to Fruits. 1883. p. 292. 



Beutenmiiller, Bui. Amer. Mus. IS'at. lii-st. Vol. IV. No. 1. 1S92. p. 272. 



Smith, N. .1. State Board of Agri. 1899. 



Beutenmiiller. Amer. Mus. .Jour. \'o]. IV. No. 4. 1904. p. 32. 



Aldrich. Cat. of X. A. Dipt. 1900. p. 104. 



