NOTES AND EXHIBITS. 487 



Mr. Froggatt exhibited specimens of wheat-stalks damaged by 

 aphids, taken from fields at Cumnock, near Molong, before the 

 rain, in which often one-quarter of the stalk was killed back : 

 the aphis appeared to be identical with the European wheat 

 pest, Siphonophora granaria Kirby. *' Frosted " wheat-stalks for 

 comparison were likewise shown. Also specimens of a fresh-water 

 crustacean {Lepidurus sp.) in various stages of development, 

 collected from lagoons bordering the Murrumbidgee at Hay, 

 N.S.W., in the middle of August. 



Dr. Hill exhibited specimens of a land nemertean {Geonemertes 

 sp.) from the Barrington River scrubs. 



Mr. Tillyard exhibited set specimens of a dragon-fly (Lestes 

 leda), illustrating the mode of oviposition. He also communicated 

 statistical data bearing upon the numerical relations of the sexes 

 of five species of dragon-flies based upon breeding experiments 

 during September and October, namely : — 



^s. $s. Total. 



Lestes leda 7 10 17 



Lestes cingulata 2 2 4 



Ischnura heterosticta 10 6 16 



Ischnura delicata 3 2 5 



Pseudagrion cyane . 8 10 18 



Total 30 30 60 



The larvae of L. cingulata were obtained at Woodford, Blue Mts., 

 those of L. leda at Belmore, and the rest at Cook's River,. 

 Canterbury. 



Mr. T. G. Taylor showed a fossil echinoderm referable to the 

 Blastoidea, a group not previously recorded from New South 

 Wales; from the Glenwilliam Carboniferous Beds, Clarence 

 Town, N.S.W. 



Mr. Steel showed a very instructive stage in the germinatioa 

 of a seed of Loranthus. 



