38 Bulletin 2: Springfield Museum. 



A disc-shaped gall of the color of the leaf in which it is found ; some- 

 times lighter colored. About 6 mm. in diameter and 2 mm. in thickness. 

 Monothalamous. Abundant in some localities. On several species of 

 rose, Rosa. 

 Rhodites multispinosus Gillette. Large spiny rose-gall. Fig. 76. 



Rhodites multispinosus Gillette, Bull. 7, Iowa agr. exp. sta., 1889, p. 284. 



Jarvis, 38th ann. rept. Ent. soc. Ontario, 1907, p. 88, pi. B, fig. 3. 

 Oblong or ovate, on stem. 25-50 mm. long; 16-25 mm. thick, and 

 clothed with numerous prickles about 8 mm. long. Light brown, becoming- 

 gray later. Surface sometimes rough, with depressions and elevations. 

 In emergence the insects make 30-50 round holes about 1.5 mm. in diame- 

 ter. Polythalamous. On wild rose, Rosa. 



Rhodites radicum Osten Sacken. Rose root-gall. 



Rhodites radicum < >sten Sacken, Proc. Ent. aoc. Phil., 1863, v. 2, p. 42, 46-47. 

 Walsh, Pract. ent., 1866, v. 1, p. 114. 



Beutenmuller, Bull, Amer. mus. nat. hist., 1892, v. 4, p. 246, pi. 9, fig. 3. 

 Cook, Ohio nat., 1904, v. 4, p. 123. 

 Jarvis, 37th ann. rept. Ent. soc. Ontario, 1906, p. 70. 



A large, irregular, red-brown gall with smooth surface. Polythalamous. 

 5-8 cm. in diameter. With deep indentation where it is attached to the 

 root of wild roses. May be common, as some report, but not frequently 

 seen, from its position. On Rosa, several species. Insects emerged April 

 28. From a single specimen in my collection insects emerged about a year 

 after it was sent to me. 



Rhodites verna Osten Sacken. Knotty rose-gall. Fig. 74. 



Rhodites verna Osten Sacken, Proc. Ent. soc. Phil.. 1863, v. 2. p. 41, 47-48. 



Beuteinniiller. Bull. Amer. inns. nat. hist., 1892, v. 4, p. 248, pi. 9, fig. 6. 



Usually several rounded galls, running together, forming an elongated, 

 knotty mass along the stem. Woody, tinged with red. Polythalamous. 

 On several species of wild rose, Rosa. 



Rosa Carolina. 

 Rhodites globulus Beutenmuller. Globular rose-gall. 



Without name, Osten Sacken, Proc. Ent. soc. Phil., 1863, v. 2, p. 42. 



Rhodites globulus Beutenmuller, Bull. Amer. mus. nat. hist., 1892, v. 4, p. 247, pi. 9, fig. 4. 



Cook, Ohio nat., 1904, v. 4, p. 123. 



Jarvis, 37th ann. rept. Ent. soc. Ontario, 1906, p. 70, pi. E, fig. 4. 



A smooth, irregularly rounded, brown gall, sharply contracted at its 

 union with the stem. Pithy, polythalamous. About 2 by 3 cm. On 

 swamp rose, Rosa Carolina. 



Rhodites sj>haericus, n. s. Fig. 75. 



A spherical hard gall attached to either side of the leaflet by a single 

 point. Rough, veiny surface. About 5 mm. in diameter. Filled by a 

 dozen or more larval cells, each with Avoody walls. Brown. On swamp 

 rose, Rosa Carolina. September. 



