464 
[March 
I can supply the deficiency, having bred an undoubted True Gall-fiy 
from it, which will be found described below as Ctjnips q. jiocci n. sp., 
quite distinct from Dr, Fitch’s species. In the case of the gall q. ficus, 
the deficiency can be supplied with probability but not with certainty, 
as the Cynips ((7. forticornis n. sp.) which I have obtained from that 
gall in addition to the Guest gall-fly is subapterous, and consequently 
the chief character which distinguishes the Psenides from the Inqui- 
Uiise is absent.* Thirdly, from the gall q. pisum Fitch, Baron Osten 
Sacken has bred another subapterous species, specifically distinct from 
the one obtained by me from the gall q. ficus, but like that species ap¬ 
parently a true gall-fly; and it is very probable, therefore, that Ci/nips 
q. pisum Fitch is a Guest gall-fly, and G. pezomachoides O. S. the true 
maker of the gall q. pisum. Indeed Dr. Fitch’s description of his C. 
q. pisum agrees very well with the guest gall-fly Spnophrus Iseviventris 
(3. S., (which I have found to inhabit several distinct kinds of galls,) 
even down to the antennal joints % 15, 9 
Judging from Dr. Fitch’s observation that ‘‘the second veinlet of 
the fore wings is curved like a bow” in all the species which he refers 
to the genus Oallaspidia, but not in “the species of the genus Cpnipsfi 
and that this “ appears to be a generic character of much value” {N. Y. 
Rep. II, §318), and knowing that all the three species which he refers 
to Oallaspidia are true Cynips, it would seem to follow that he habitu¬ 
ally refers Op nips to Gallaspidia and the InquiUnse, or Guest gall-flies 
to Cynips. If this reasoning be correct, all the eight species catalogued 
and described by him under the genus Cynips are probably Guest gall¬ 
flies. The only fact at variance with this hypothesis is, that he refers 
seminator Harris, which is a true Gall-fly, to Cyv/ips and not to Cal- 
laspidia. But Baron Osten Sacken notices several differences between 
the true Cynips obtained by him from the gall seminator and those 
described by Dr. Fitch; and as the true Gall-flies and the Guest gall- 
* Mr. Bassett has bred both C. q. forticornis in November and December and 
Synophrus Iceviventris in the following summer from q. feus galls, and has 
kindly sent me specimens of both species. I had given him my views on the 
subject, and he writes me word that “he is quite confident that forticornis is 
the true Gall-fly of Fitch’s q. ficus, having found more than once the remains 
of a perfect fly in the central cells of that gall about the 20th of November.”— 
March 14, 1864. 
