340 
IOWA ACADEMY OF SCIENCE Voi.. XXVII, 1920 
Fig. 57. Diagram illustrating phylogeny of the anteoninae. 
of all the other genera. Both sexes are winged, the fore tarsi 
in the female are not modified to form chelae, and there is thus 
no sex dimorphism. The wings show a reduced venation and 
have a broadly oval stigma. In our one record of oviposition 
the host is not paralyzed and there is also more range in the kind 
of insect attacked, the Membracidae and Cicadellidae being sub- 
ject to parasitism by species of this genus. There is great diversity 
in the larval habit, polymebrony having been found, the larvae 
in this case being internal and not being inclosed in sacs. 'When 
present the larval sac shows a more generalized structure. 
Group II, comprising the genus Anteon and other related 
genera, shows a greater degree of specilization. While both 
sexes are winged there is some sex dimorphism, the females having 
the fore tarsi modified into chelae. The latter are often either 
non-extensile or only partly so (Fig. 56, 1-4). The stigma is 
broadly oval as in! the case with the first group but the wing 
venation is different, there being two basal cells present. Species 
in this group parasitize Cicadellidae only. 
Group III comprises Gonatopus and related apterous genera 
as well as Deinodryinus and related winged genera. In the 
winged species the venation is similar to that found in group If, 
but the stigma is lanceolate. The type of chela is identical in 
both apterous and winged forms, the claw being non-lamellate 
(Fig. 56, 5 and 7). Species in this group parasitize Cicadellidae 
only. 
6 Kornhauser, S. I., Journal of Morphology, vol. 32, no. 3, 1919, pages 547-554. 
