360 



[Mat 



middle of the leaf. It may be inferred hence, that these galls are the 

 produce of two different insects. 



47. These two galls (on Q. primus and alba) were mentioned by me, 

 Proc. etc. I, p. 62, in connection with the gall of 0. verrucarum. 



48. Gall on Q. palustris, described by me, Proc. etc. I, p. 253. 



49. Gall on Q. obtusiloba, described by me, Proc. etc. T, p. 255. 



50. Gall on Q. alba, described by me, Proc. etc. I, p. 255. When 

 dry, these galls become brown and hard like wood ; being crowded to- 

 gether, their lower ends become wedge-shaped. 



51. Gall on Q. rubra, called Q. <leci<lu<i by Mr. Bassett, Proc. etc. 

 [II, p. 689 ; this gall, of which I have specimens, has some analogy to 

 that of Q. obtusiloba (No. 46), but it is certainly different. 



52. These galls were described by me, Proc. etc. I, p. 256, as being 

 from ati unkuown kind of oak. Since then, Mr. Bassett communi- 

 cated to me apparently similar galls, found in Ohio, on Q. bicolor. As 

 the specimens described by me were communicated to me by Dr. Mor- 

 ris, together with the gall of C. strobilana, occurring on Q. bicolor, it 

 is not unlikely that they were found on the same tree. 



53. Mr. Walsh mentions this gall in the following manner (Proc. etc. 

 III. p. 639) : — '• I found last August and early in September, in very 

 great numbers, both on Q. rubra and Q. Hnctoria, growing from tin 

 aide of the cup of the acorn, a globular, smooth, plum-like, fleshy, in- 

 tensely bitter gall, about 0.59 to 0.75 inch in diameter, mottled with 

 yellowish and crimson outside and internally yellowish in the centre, 

 and towards the circumference pink, like a watermelon. This gall, of 

 which I forwarded a specimen to Baron Osten Sacken, is thought by 

 him to be identical with his Q.juglans, which was described only from 

 dry, shrivelled up specimens, and which was stated by Mr. Hitz, who 

 found it, "to grow on the branches of the White Oak.' . . . Either 

 Mr. Hitz must be mistaken, ... or else my gall is a distinct species. 

 If so, I propose for it the name of Q. prunus." The dry gall sent by 

 Mr. Walsh looks exactly like the galls which I have described Proc. 

 etc. I, p. 255, under the name of Q.juglans. The inside, however, of 

 the dry gall is porous, like pith, and therefore much less hard than that 

 of my galls. The identity of these galls seems therefore at least doubt- 

 ful, since I have compared them more closely. 



54. Although different in shape, this gall, found on Q. falcata and 

 described by me Proc. etc. I, p. 69, No. 20, belongs to the same type 

 of structure with the gall C. spongifica, and probably produces an insect 

 of the same group. 



