432 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 15 



only and she was found dead at 3:00 p.m. on July 1, she having been 

 observed moving feebly at 1:00 p.m. From this one instance of the 

 queen living ten days with food, compared with the three checks without 

 food, it is quite evident that this queenbee was able to take food from a 

 bottle feeder and to nourish herself. It is quite frequently observed in 

 mailing queens that on arrival the queen will be the only individual alive, 

 this also indicating that she is able to take food alone. 



For purposes of comparison, ic may be stated that at the time the 

 drones were experimented upon a cage containing worker bees and fed 

 cane sugar was foimd to live an average of 9.175 ='=0.1291 days, the last 

 worker dying on the 19th day. The detailed data for this feeding exper- 

 iment will be used later for another purpose and is not here recorded in 

 full. 



Table Showing Death Rate of Drones 



Scientific Notes 



A Rice Leaf-Miner. Parts of California's rice growing districts have suffered 

 this year from the attack of a leaf-miner identified as Hydrellia scapularis Loew. 

 The flies pupated in the leaves and emerged during the last two weeks of June. 

 One brood alone was noticed attacking in June at which time the rice was 6 to 12 

 inches high. The attacked leaves turned brown and lay flat on the water as if 

 the plant were dead but after a few days of warm weather the greater portion of 

 those affected sprouted. The attack will delay harvest which gives rise to greater 

 danger from early rains interf erring with the harvest. The injury was most no- 

 ticeable in checks that were carrying an unusual depth of water, which was used 

 to drown water grass. The seriousness of the attack was due to the weakening 

 eflfect of too great a depth of water coupled with the leaf -miner injury. 



E. R. DE Ong, 

 University of California. 



Ocnerostoma piniariella Zeller, Anther Introduced Insect. Specimens of western 

 white pine needles mined by this insect were received under date of June 29, 1922 



