392 HENRY SniMER, M. D. 



.05 incli ill diameter, I took a single winged imago with body .025 inch 

 in length ; with it there were a few eggs, but no other insect. I verified 

 this same circumstance in several other small galls of this species, and 

 it therefore appears probable that the winged imago was the mother- 

 insect, developed into the winged state, although we have heretofore 

 considered them as males. 



On the surface of the leaves bearing these galls, were observed nu- 

 merous, small unknown acarians, in all stages of development, from the 

 egg to the perfect insect. They somewhat resemble a species found 

 abundantly on the White Maple. 



Gall No. 8. — Resembles gall No. 7, but generally smaller, less firm, 

 more leathery and pliable, less rounded abive, and some yellow in color. 

 They are very numerous, having counted as many as eight hundred on 

 a single leaf; where they arc thus crowded together, they are very 

 small, say from .25 — .10 inch, in diameter. 



On June 9th the eggs were hatching and the young could be seen 

 running about on the leaves as w^ell as in the galls. The mother insect 

 was then a pale yellowish, subglobular mass, length .02 inch. 



On July 23rd, I found the galls still containing both eggs and larvae, 

 the older galls becoming uninhabited, while up on the top limbs and 

 young shoots, the new gal'.s Avere becoming so numerous as to interfere 

 with the growth of the leaves, and it appeared impossible for the galls 

 to develop. 



Although I have never succeeded in finding a winged imago, after 

 having examined hundreds of galls, I presume it to be identical with the 

 species mentioned by Mr. Walsh, {Proc. Ent. Soc. Phil, vi, 28o), as 

 cari/ae-soncn. Should it not prove to be a variety of I), glohosum, the 

 name will be as follows : 



Dactylosphaera caryae-semen. 



caryii:- semen, Walsh, MS. Proc. Ent. Soc. Phil, vi, p. 283. 

 For a description of the gall, egg, larva, and mother insect, see my 

 paper in Proc. Acad. Nut. Sci. Jan. 1867, where I included it under 

 D. (jlobosum ; because, although the galls were of diiferent size, I could 

 not detect any difference in the eggs, larva) and mother insect, and for 

 other reasons there assigned. It must be admitted, however, that the 

 similarity of the inhabitants, same color of eggs, and lateness of develop- 

 ment of both galls are characters of great weight; and Mr. Walsh, in 

 his First Report on the Noxious Insects of Illinois, says that the ana- 

 tomical difl'erences between the galls of his carijse-glohuli and caryx- 



