166 PROCEEDINGS OF SOCIETIES. 



by a vote of the Society, on the previous recommendation of Council. 

 The subscription for this class to be limited to 5s. a year, to cover ex- 

 penses. 



This was seconded by Dr. G. B. Owens, and, after having been fully 

 discussed, was passed unanimously. 



By a resolution of the Society it was also determined that Corre- 

 sponding Members, paying 5s. annually in advance to the Treasurer, 

 should be entitled to the Monthly Report of the Society's meetings, and 

 a copy of the Society's Proceedings. 



After due ballot, Edward Hamilton, M. D., 8, Stephen's-green, was 

 declared duly elected an Ordinary Member. 



The meeting then adjourned till June. 



DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL 

 ASSOCIATION. 



FRIDAY EVENING, MARCH 20, 1857. 



R. Ball, LL.D., President, in the Chair. 



The Minutes of last General Meeting having been read, were signed by 

 the Chairman. 



Mr. A. H. Haliday, V.P., read the following — 



NOTE ON A PECULIAR FORM OF THE OVARIES OBSERVED IN A HYMENOPTEROUS 

 INSECT, CONSTITUTING A NEW GENUS AND SPECIES OF THE FAMILY DIA- 

 PRID^J. 



The perusal of Siebold's book on Parthenogenesis, which lies on the 

 table, along with Mr. Dallas's translation of it into English, has served 

 to remind me of an observation, made many years since, upon a species 

 of the family DiapridaB, which was not infrequent in one spot near the 

 house in the country where I then resided, and of which none of the 

 specimens appeared to differ from the rest in any of the external cha- 

 racters by which the sexes are generally distinguishable in this family. 

 I considered all those I had found to be females ; but for the sake of 

 greater certainty I proceeded to dissect two specimens, paying particu- 

 lar attention to the evidence on that point. While the result confirmed 

 my first impression, it also brought to light a very unusual form of the 

 ovaries, drawings of which I now lay before the Association. I will 

 not presume to say that the phenomena are sufficient to verify the con- 

 jecture which they suggested to me at the time, that a physiological 

 arrangement was presented here, such as is established by abundant 

 evidence in the case of the Gallflies ( Cynips, &c). On this supposition, 

 the presence of females only would be explained as being something 

 more than a contingency depending upon circumstances of time and 

 place. 



