AMERICAN IIOMOrTERA. 393 



semen are quite well marked, the former opening with a slit and the 

 latter with a round nipple-like projection, &c. &c. 



Gall No. 9. — On the same leaves containing the small galls, Nos. 

 7 and 8, I observed a number of larger ones with a dimpled depression 

 above (which may be caused by the collapse of the thin paper-like 

 centre), an opening beneath by a rounded, downy orifice, and having a 

 diameter of .Oi3 — .33 inch, and a vertical depth of .12 — .16 inch; all 

 contained the female and her eggs, and some larvaD. 



Dactylosphaera foreatum, n. sp. 



Wi.NGKD IMAGO. — Abdomeii and prothorax pale orange, with a dark band or 

 ring around the mcsothorax ; wings carried flat on the back in repose, hyaline, 

 veins small, stigma very faint, smoky; antennae 3-jointed, the last joint long, 

 subcylindrical and on a very long pedicle; abdomen quite pointed. Length 

 to tip of wings .06; of antennce .005 inch. 



Mother ixsect. — Pale yellow, palest posteriorly. Length .04; width .02 inch. 



On June 20th the winged images were very plenty, but no eggs 

 could be found. 



GrALL No. 10. — This is the gall of my B. (jhhosum, described ^t 

 length in Proc. Acad. Nat. Scr. Phil., Jan. 1867, and, with No. 8, 

 are the only known Hickory galls that have the character of being soft 

 and leathery in structure. The perfect insect was found between Sept. 

 20th, and Oct. 20lh 1866, since which time I have not seen it. I then 

 described it as being found on what I supposed to be Carj/a glabra, but 

 which now proves to bo C. amara. See below. 



This is s ) manifestly distinct from cdrijse-glohuJi, Walsh, that a com- 

 parison is uncalled for; the latter is said to mature in June, whilo 

 fflohosuvi matures in October; and the opening of the galls are quite 

 different in shape, that oi' [/loho.oonho'm'^ rounded and on a nipple-like 

 projection, while that of cnri/se-f/lf/h>i/i"is an elongated slit. 



I am not at all certain that Gall No. 8, is specifically distinct from 

 this. 



I found all the above mentioned galls, excepting Nos. 7, 8 and 9, dry 

 and depopulated on July 6th ; and on July 21st, 22nd and 23rd, I made 

 a careful examination of all the species ol" galls here enumerated while 

 yet on the trees, and found them all dry and depopulated except No. 8 

 and a few of No. 9, which although entirely free from their legitimate 

 inhabitants, were yet green and quite firm, and in each of them I found 

 a pupa of some unknown parasite. This is quite an interesting circum- 

 stance and shows how admirably nature provides for the life of all things, 

 in the instance of this gall maintaining its integrity so much beyond the 

 normal time, for the preservation of an intruder ! 



TRANS. .VMER. ENT. SOC. (51) DECEMBER, 1869. 



