The adults of ignotus live for only a few days at the most, oviposition often occurring only a few hours after emergence. The females will refuse to oviposit unless they find a bush in the right condition for receiving the eggs A lot of the insects which I placed on a cultivated rose which was somewhat retarded in development refused to climb over the bush at all to examine the buds, though the same insects became active enough when placed on a plant in a more advanced state of development. They carefully examined the young leaves, hardly yet out of the buds, and in these leaves the eggs were laid. The quantities of parasites which emerged, mostly a couple of weeks after the cynipids, were very active in examining the leaves of the same plant and many of them were observed to oviposit, but whether into the eggs and very young galls of the gall-wasps I am not certain.
The points at which ovipositioin was made by the igntotus females were carefully marked and kept covered by gauze bags for almost a month and a half. The galls produced were first seen about the first of September, i. e., over a month and a half after the eggs were laid, but the degree of development of the galls indicated that they had appeared possibly two weeks earlier. The galls thus obtained were typical ignotus galls in every way resembling the galls of the parent generation. Nothing else known of the life history of the species would suggest that it possesses an alternation of generations. Ants attacked the cvnipids whaen they died after oviposition and only a single whole specimen, a male, was rescued for the collection. This, with galls of the two successive generations, are in my collections, distinctively labelled. I cannot say positively whether the reproduction is wholly or at any time parthenogenetic, though it is very likely that it is parthenogenetic at least part of the time. The one male in my net may have fertilized the females, though I did not observe copulation.
Neuroterus batatus (Fitch)
In most of the following references the two generations have not been separately described.
Cyntips Quercas-batatus Fitch, 1859, Report Nox. Ins. N. Y., p. 810.
Cynips quercus batatus {{Smallcaps|Osten Sacken, 1861, Proc. Ent. Soc. Phila., I, p). 71. Thomess, 1879, Trans. Ill Hort. Soc. for 1878, P. 198. Packard, 1881, U. S. Ent. Comm. Bull., VII, p. 39; 1890, 5th Report U. S. Ent. Comm., p. ii1.
Cynips q.-batatus Osten Sacken, 1861, Ent. Zeit. Stett., XXII, pp. 410, 414. Basset, 1864, Proc. Ent. Soc. Phila., III, p. 684; 1877, Can. Ent., IX, p. 121. Packard, 1890, 5th Report U. S. Ent. Comm., p. 113.
Cynips batatus Osten Sacken, 1865, Proe. Ent. Soc. Phila., IV, pp. 340, 344, 350, 354. Packard, 1881, U. S. Ent. Comm. Bull., VII, p. 156.
