1863.] 
327 
that, according to Hartig, the genus Aulax has the % antennae 15 or 
16-jointed, and that in some species the radial area is closed, and in 
others open. If this is an Aitlax it seems to be of a section not hith¬ 
erto noticed in this country. 
The striking resemblance between true gall-flies and many of their 
parasites is often noticed by Baron Osten Sacken in the papers so often 
referred to. But it still seems a little singular that the two rather ex¬ 
ceptional characteristics of the genus Aulax —an open radial area and 
16-jointed antennae should be met with in the same species—and in a 
case too where the male of the true Cynips was not found. Just com¬ 
mencing my entomological studies I do not attempt to decide upon 
their true character, but shall be glad to furnish specimens to any 
entomologist who may be specially interested in the matter. 
Quercus ilicifolia, and Q. coccinka. 
I have galls from these two species of oak that are probably inden- 
tical with a species from Q. coccinea, described by Baron Osten Sacken 
(Proc. Ent. Soc. Phil, i, p. 256.) as follows:— 
‘‘‘■Round., somewhat ohlong., hollow, pale greenish-yellow gall on the 
under side of the leaf, slightly projecting on the opposite side; inter¬ 
nally an oblong kernel, kept in its position by filaments, radiating to¬ 
wards the shell.'’ 
His specimens produced only parasites, and the gall-flies I have are 
all, except two or three, from the galls from Q. ilicifolia. Both the 
gall and fly bear a rather close resemblance to the species last described, 
though the difierences are so marked as to entitle them to the rank of 
a distinct species. Though measuring nearly as much in length they 
are much smaller. I take pleasure in giving to this species the name 
of its discoverer, who has added so much to our knowledge of this 
interesting genus. 
Cynips q. Osten Sackenii n. sp. 
9- Black, head and thorax irregularly but not deeply sculptured; face spa¬ 
ringly pubescent; jDalpi brown; antennse, short, pale brown 13-jointed. Tho¬ 
rax with a few scattered hairs. The longitudinal lines are broken by the 
sculpturing and only indistinctly traceable; the mesothorax along the posterior 
margin is hounded hy a prominent, black, shining ridge. Legs: posterior pair very 
dark shining brown, the others somewhat reddish brown, all lighter at the 
joints. Abdomen black shining; 2nd segment very long with a very few scat¬ 
tered hairs beneath the wings. Wings with an extremely faint tinge of brovjn, 
