Table III. Cynipid Galls
Genus | Amount of Hypertrophy | Larval Cell | Order of Larval Cells | Connection with Host |
Aulacidea Phanacis Timaspis |
None, or small | Not distinct nor separable | Aggolmerate | Not distinct, and entirely inseparable |
Aylax | None, or small, or great | Distinct but inseparable | Agglomerate or polythalamous; monothalamous in 4 species | Not distinct, or not separable; separable in 3 or 4 species |
Rhodites | Small or great | Distinct but inseparable | Agglomerate or polythalamous | Inseparable or separable |
Diastrophus | Small | Distinct, but only slightly separable | Agglomerate or polythalamous | Inseparable |
Gonaspis | Not very great | Distinct, only slightly attached | Monothalamous | Separable |
Neuroterus | None, or small | More or less distinct; not separable | 26 species agglomerate or polythalamous; 26 species monothalamous | 30 species inseparable; 22 species separable |
Amphibolips | Great | Very distinct, but more or less connected with the rest of the gall by strands or fibers | Monothalamous | Entirely distinct and separable |
Disholcaspis | Great | Entirely distinct and separable (at least in maturiry) | Monothalamous | Entirely distinct and separable |
Reproduction
(Table IV)
A large proportion of the Cynipidæ reproduce agamically. There can be little question of the non-existence of the males of many of the species. Hartig (1840) bred almost 10,000 individuals of a single species, Dryophanta disticha, and secured only females. In spite of extensive collecting and breeding of many species of gall-wasps, both in Europe and America, no males have been found for some of them, and Adler (1881) and other workers have regularly secured galls and mature insects from the eggs of these agamic females.
The successive generations of some species are all similar and agamic; Adler found this to be the case with five species, each of which he bred for two successive generations—for three generations in the case of Andricus serninationis. In the case of other species, most likely for the