NOTES AND EXHIBITS. 251 



Mr. Palmer exhibited specimens of the spicier, at present unde- 

 termined, which fabricates the remarkable egg-bags, examples of 

 which he had exhibited at the March Meeting of the Society. 



Mr. Whitelegge exhibited examples of what were represented as. 

 early stages of the truffle, which had been sent by Mr. A. H. 

 Cooper of Double Bay. 



Mr. Macleay exhibited the fifty species of Insects described in 

 his Paper. 



Mr. Macleay also exhibited some grass infested by a minute grub, 

 which lived in the stem and caused a thickening of it. He stated 

 that the grass had been sent for examination under the belief that 

 the prevalence at the present season of large niimbers of worms in 

 sheep, might in some way be traceable to the minute worms in the 

 grass. A microscopical investigation by Dr. Katz had shown 

 however that the worms in the grass were not Entozoa but maggots 

 of minute Dipterous Insects, probably Cecidomyiadce or gall gnats, 

 or possibly minute Muscidse of the Oscinides group. The habit of 

 the insect somewhat resembled that of Cecidomyia destructor, Say, 

 the "Hessian Fly," so destructive to wheat crops in America. 



Mr. Macleay also exhibited for Professor Stephens a lemon 

 grown by Mr. Long of Hyde, in which the carpels were separated 

 as in the fingered orange, and another approaching the Horned or 

 Navel Orange in having a supernumerary row of carpels. 



Mr. Fletcher exhibited living specimens of Bipalium kewense 

 referred to in his note. 



