1862.] 24r» 



visible, requiring a strong lens to be distinguished). Legs reddish-yellow, pubes- 

 cent, hind tarsi sometimes infuseated ; onychia black. Wings with a brownish- 

 black spot at the basis of the radial area; it slightly trangresses (he second trans- 

 verse vein, but does not touch the anterior margin oi' the wing. 



I have found this gall more than once on young trees, belonging either 

 to Q. coccinea or Q. rubr<(. (The leaves were elongate, cuneate at the 

 basis and hardly or, at least, not deeply, sinuate ; this is, I believe, one of 

 the varieties of the scarlet oak,) 



Among the specimens of my collection, I find a number of galls, col- 

 lected in one locality and somewhat different in shape from the typical 

 specimens of C. q. i)uaiis. The latter are more or less globular, the leaf 

 being, so to say, the tangent of the globe. There is no distinct point or 

 nipple on the top. The other gall, on the contrary, is somewhat lemon- 

 shaped, being attenuated at its basis with a corresponding elongation, end- 

 ing in a minute nipple, at the opposite end. Its color is more brownish 

 than that of C. q. iiianis; on the inside, I did not detect any difference 

 between both galls. The tree is also either the red, or the scarlet oak. 

 As twelve specimens of this gall, although of different size, all show the 

 same characters with distinctness, I can hardly believe that these are mere- 

 ly accidental. I obtained only parasites from this gall. 



Q. COCCINEA. /Scarlet Oak. Lar<jt\ more or less round </all, not atten- 

 uated at the basis, surface (jlossi/, shell thin and brittle ; o)i the inside with 

 a spongy substance, surrounding a kernel in the centre. Diameter upwards 

 to an inch and a half. C. Q. coccinea 0. S. (Syn. C. confluens 0. S. 

 non Harris, ex parte; gall No. 1, 1. c. p. 56.) 



The external appearance of this gall is very like that of the gall of C. 

 q. inanis. It is more or less globular (although irregular specimens of 

 both frequently occur), that is, not narrowed towards the basis; its sur- 

 face is glossy. Internally, it is easily distinguished by the spongy mass 

 which fills it. It seems to reach a larger size than the former gall, as 

 among six specimens now before me, one measures an inch and a half in 

 diameter and two others are but little smaller, whereas among eight spec- 

 imens of the gall of ('. q. inanis the largest does not much exceed an 

 inch. 



From the following gall it is distinguished by its glossy surface, its less 

 dense and more whitish spongy internal matter, its much thinner and brit- 

 tle shell and by its shape, which is more rounded on the top. From this 

 gall I have obtained this year (about the 25th of June) only one 9 speci- 

 men, not showing any perceptible difference from 0. q^inanis, except that 



