92 



TBNTHREDINIDAE. 



PONTANIA DESMODIOIDES Walsb. 



'Nemutua auUcis despiodioides — 



Walsh, Proc. Eut. Soc. Phil. Vol. \\. ISGB. p. 257. 



Norton, Trans. Amer. Ent. Soc. Vol. I. 1867. p. 211. 



Dalla Torre, Cat. Hymen. Vol. I. 1894. p. 259. 

 Nematus inquilinus — ■ 



Walsh, Proc. Ent. Soc. Phil. Vol. VI. ISUG. p. 260. 



Norton, Trans. Amer. Eut. Soc. ^'ol. I. 1867. p. 213. 



Provancher, Can. Nat. Vol. X. 1878. p. 57. 



Provanchor, Faun. Ent. Can. Hymen. 1883. p. 190. 



Dalla Torre. Cat. Hymen. Vol. I. 1894. p. 230. 

 Pontania inquilina — 



Marlatt. Proc. Ent. Soc. Wash. Vol. III. 1895. p. 266. 

 Pontania desmodioides — 



Marlatt, U. S. Dept. Agri. Div. Eut. Tech. Ser. 3. p. 40. 1896. 



This gall has been recently described by Marlatt as follows : "The 

 gall is found on Salix /lum/ilis. It is smooth, flattish, fleshy, sessile, yellow- 

 ish green, monothalamous, semi-circular in general shape like the seed of 

 a Desmidium or the quarter of an orange. It is about equally divided be- 

 tween the two surfaces of the leaf; no rosy cheek. Generally there is but 

 one gall on the leaf ; one leaf was seen with three upon it. Length 0.23 to 

 0.50 inch." It has since been reported from Massachusetts, New York, 

 Indiana, Illinois, Missouri, and Canada. 



Pontania pomum Walsh. 



ycmatus salicis pomum — 



Walsh, Proc. Ent. Soc. Phil. Vol. VI. 1866. p. 255. 

 Norton. Trans. Amer. Ent. Soc. Vol. I. 1867. p. 216. 

 Walsh and Riley, Amer. Ent. ^'ol. II. 1869. pp. 45-49. 

 Riley, 9th Rept. Ins. of Mo. 1877. p. 20. 

 Thomas, 10th Rept, Ins. of Ills. 1881. p. 68. 

 Provancher. Nat. Can. Vol. XIII. 1882. p. 292. 

 Provancher. Can. Hymen. 1883. p. 741. 

 Cresson, Syn. Hymen. Amer. 1887. p. 157. 

 Lintner. 5th Rept. Ins. of N. Y. 1889. p. 17::. 

 Dalla Torre. Cat. Hymen. Vol. I. 1894. ji. 259. 



